<!--

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
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  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

function hideAllLayers() {
	var text, i;

	if (document.layers) {
		for(i=0; i<document.layers.length;i++){
			document.layers[i].visibility='hidden';
		}
	}
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
function writeDHTML(strName, elementFlag) {
	var myLabelLayer;
	var myNameLayer;
	var labelString;
	if (elementFlag) {
		labelString = '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Element:';
	} else {
		labelString = '  Compound:';
	}
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	   myLabelLayer = document.labelLayer;
	   myNameLayer = document.nameLayer;
	}
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	   myLabelLayer = document.all['labelLayer'];
	   myNameLayer = document.all['nameLayer'];
	}
	else if (isIE5 || isNS6) {
	   myLabelLayer = document.getElementById('labelLayer');
	   myNameLayer = document.getElementById('nameLayer');
	}

	if (isIE5 || isNS6 || isIE4) {
		myLabelLayer.style.fontFamily = 'Arial, Helvetica, sans-serif';
		myLabelLayer.style.fontSize = '12pt';
		myLabelLayer.style.fontWeight = 'bold';
		myLabelLayer.style.color = '#C3B800';
		myLabelLayer.style.visibility = 'visible';
		myLabelLayer.innerHTML = labelString;
		
		myNameLayer.style.fontFamily = 'Arial, Helvetica, sans-serif';
		myNameLayer.style.fontSize = '14pt';
		myNameLayer.style.color = '#003366';
		myNameLayer.style.visibility = 'visible';
		
		myNameLayer.innerHTML = strName;
		// need to do some type of focus or reload here so we can fix the error in MAC IE 5.1 on OS X
		if (isIE5 && isMac) {
			myNameLayer.close();	// this one has some potential.  perhaps we should try
			 						// doing this after the images are loaded?  or switch it so that we do the images
									// first, then close the layer.
									// nope, closing after the images are loaded didn't make a difference.
		}		
	} else { // this is Netscape Navigator 4
		with(myLabelLayer.document) {
			open();
			labelString = '<SPAN STYLE="position: absolute; left:2px; top:2px; width:137px; height:17px; z-index:1; font-family: Arial, Helvetica, sans-serif; font-size: 12pt; font-weight: bold; color: #C3B800">' + labelString + '</span>';
			write(labelString);
			close();
		}
		with(myNameLayer.document) {
			open();
			strName = '<font face="Arial, Helvetica, sans-serif" size="4" color="#003366">' + strName + '</font>';
			write(strName);
			close();
		}
		
	}
}

function Salt() {
	MM_swapImgRestore();
	MM_swapImage('na','','../images/activities/act1/periodic-table/sodium-on.gif',
				'cl','','../images/activities/act1/periodic-table/chlorine-on.gif',
				'salt','','../images/activities/act1/periodic-table/salt-on.gif',1);
	writeDHTML('Salt<br>NaCl', false);
	

	return true;
}

function Humans() {
	MM_swapImgRestore();
	MM_swapImage('h','','../images/activities/act1/periodic-table/hydrogen-on.gif',
				'be','','../images/activities/act1/periodic-table/beryllium-on.gif',
				'boron','','../images/activities/act1/periodic-table/boron-on.gif',
				'c','','../images/activities/act1/periodic-table/carbon-on.gif',
				'n','','../images/activities/act1/periodic-table/nitrogen-on.gif',
				'o','','../images/activities/act1/periodic-table/oxygen-on.gif',
				'fluorine','','../images/activities/act1/periodic-table/fluorine-on.gif',
				'na','','../images/activities/act1/periodic-table/sodium-on.gif',
				'mg','','../images/activities/act1/periodic-table/magnesium-on.gif',
				'aluminum','','../images/activities/act1/periodic-table/aluminum-on.gif',
				'phosphorus','','../images/activities/act1/periodic-table/phosphorus-on.gif',
				'sulfur','','../images/activities/act1/periodic-table/sulfur-on.gif',
				'cl','','../images/activities/act1/periodic-table/chlorine-on.gif',
				'k','','../images/activities/act1/periodic-table/potassium-on.gif',
				'ca','','../images/activities/act1/periodic-table/calcium-on.gif',
				'fe','','../images/activities/act1/periodic-table/iron-on.gif',
				'cu','','../images/activities/act1/periodic-table/copper-on.gif',
				'zinc','','../images/activities/act1/periodic-table/zinc-on.gif',
				'i','','../images/activities/act1/periodic-table/iodine-on.gif',
				'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
	writeDHTML('Many elements.', false);
	return true;
}

function Chalk() {
	MM_swapImgRestore();
	MM_swapImage('c','','../images/activities/act1/periodic-table/carbon-on.gif',
				'o','','../images/activities/act1/periodic-table/oxygen-on.gif',
				'ca','','../images/activities/act1/periodic-table/calcium-on.gif',
				'chalk','','../images/activities/act1/periodic-table/chalk-on.gif',1);
	writeDHTML('Chalk<br>CaCO<sub>3</sub>', false);
	return true;
}

function Ammonia() {
	MM_swapImgRestore();
	MM_swapImage('h','','../images/activities/act1/periodic-table/hydrogen-on.gif',
				'n','','../images/activities/act1/periodic-table/nitrogen-on.gif',
				'ammonia','','../images/activities/act1/periodic-table/ammonia-on.gif',1);
	writeDHTML('Ammonia<br>NH<sub>3</sub>', false);
	return true;
}

function ChlorophyllA() {
	MM_swapImgRestore();
	MM_swapImage('h','','../images/activities/act1/periodic-table/hydrogen-on.gif',
				'c','','../images/activities/act1/periodic-table/carbon-on.gif',
				'n','','../images/activities/act1/periodic-table/nitrogen-on.gif',
				'o','','../images/activities/act1/periodic-table/oxygen-on.gif',
				'mg','','../images/activities/act1/periodic-table/magnesium-on.gif',
				'chlorophyll','','../images/activities/act1/periodic-table/chlorophyll-on.gif',1);
	writeDHTML('Chlorophyll A<br>C<sub>55</sub>H<sub>72</sub>MgN<sub>4</sub>O<sub>5</sub>', false);
	return true;
}

function Water() {
	MM_swapImgRestore();
	MM_swapImage('water','','../images/activities/act1/periodic-table/water-on.gif',
				'h','','../images/activities/act1/periodic-table/hydrogen-on.gif',
				'o','','../images/activities/act1/periodic-table/oxygen-on.gif',1);
	writeDHTML('Water<br>H<sub>2</sub>O', false);
	return true;
}

function Sugar() {
	MM_swapImgRestore();
	MM_swapImage('h','','../images/activities/act1/periodic-table/hydrogen-on.gif',
				'c','','../images/activities/act1/periodic-table/carbon-on.gif',
				'o','','../images/activities/act1/periodic-table/oxygen-on.gif',
				'sugar','','../images/activities/act1/periodic-table/sugar-on.gif',1);
	writeDHTML('Sugar<br>C<sub>12</sub>H<sub>22</sub>O<sub>11</sub>', false);
	return true;
}

function QuartzSand() {
	MM_swapImgRestore();
	MM_swapImage('o','','../images/activities/act1/periodic-table/oxygen-on.gif',
				'silicon','','../images/activities/act1/periodic-table/silicon-on.gif',
				'quartz','','../images/activities/act1/periodic-table/quartz_sand-on.gif',1);
	writeDHTML('Quartz Sand<br>SiO<sub>2</sub>', false);
	return true;
}

function Caffeine() {
	MM_swapImgRestore();
	MM_swapImage('h','','../images/activities/act1/periodic-table/hydrogen-on.gif',
				'c','','../images/activities/act1/periodic-table/carbon-on.gif',
				'n','','../images/activities/act1/periodic-table/nitrogen-on.gif',
				'o','','../images/activities/act1/periodic-table/oxygen-on.gif',
				'caffeine','','../images/activities/act1/periodic-table/caffeine-on.gif',1);	
	writeDHTML('Caffeine<br>C<sub>8</sub>H<sub>10</sub>N<sub>4</sub>O<sub>5</sub>', false);
	return true;
}

function displayElement(element, elementSymbol) {
	MM_swapImgRestore();
	switch(elementSymbol)
	{
		case "h": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'caffeine','','../images/activities/act1/periodic-table/caffeine-on.gif',
							'sugar','','../images/activities/act1/periodic-table/sugar-on.gif',
							'water','','../images/activities/act1/periodic-table/water-on.gif',
							'chlorophyll','','../images/activities/act1/periodic-table/chlorophyll-on.gif',
							'ammonia','','../images/activities/act1/periodic-table/ammonia-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "na": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'salt','','../images/activities/act1/periodic-table/salt-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "cl": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'salt','','../images/activities/act1/periodic-table/salt-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "be": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "boron": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "c": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'caffeine','','../images/activities/act1/periodic-table/caffeine-on.gif',
							'sugar','','../images/activities/act1/periodic-table/sugar-on.gif',
							'chalk','','../images/activities/act1/periodic-table/chalk-on.gif',
							'chlorophyll','','../images/activities/act1/periodic-table/chlorophyll-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "n": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'caffeine','','../images/activities/act1/periodic-table/caffeine-on.gif',
							'ammonia','','../images/activities/act1/periodic-table/ammonia-on.gif',
							'chlorophyll','','../images/activities/act1/periodic-table/chlorophyll-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "o": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'caffeine','','../images/activities/act1/periodic-table/caffeine-on.gif',
							'sugar','','../images/activities/act1/periodic-table/sugar-on.gif',
							'chalk','','../images/activities/act1/periodic-table/chalk-on.gif',
							'chlorophyll','','../images/activities/act1/periodic-table/chlorophyll-on.gif',
							'water','','../images/activities/act1/periodic-table/water-on.gif',
							'quartz','','../images/activities/act1/periodic-table/quartz_sand-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "fluorine": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "mg": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'chlorophyll','','../images/activities/act1/periodic-table/chlorophyll-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "aluminum": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "phosphorus": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "sulfur": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "k": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "ca": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'chalk','','../images/activities/act1/periodic-table/chalk-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "fe": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "cu": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "zinc": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "i": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'humans','','../images/activities/act1/periodic-table/humans-on.gif',1);
			break;
		case "silicon": MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',
							'quartz','','../images/activities/act1/periodic-table/quartz_sand-on.gif',1);
			break;
		
		default: MM_swapImage(elementSymbol, '', '../images/activities/act1/periodic-table/' + element.toLowerCase() + '-on.gif',1);
	}
	self.status = element;
	writeDHTML(element, true);
	return true;
}

//  This is the workaround function for MAC IE 5.1 on OS X
function setAndClearImages() {
	setCompounds();
	MM_swapImgRestore();
	setPeriodicTable();
	MM_swapImgRestore();
}

//  This is the workaround function for MAC IE 5.1 on OS X
function setCompounds() {
	MM_swapImage('salt','','../images/activities/act1/periodic-table/salt-on.gif',
				'humans','','../images/activities/act1/periodic-table/humans-on.gif',
				'chalk','','../images/activities/act1/periodic-table/chalk-on.gif',
				'ammonia','','../images/activities/act1/periodic-table/ammonia-on.gif',
				'chlorophyll','','../images/activities/act1/periodic-table/chlorophyll-on.gif',
				'water','','../images/activities/act1/periodic-table/water-on.gif',
				'sugar','','../images/activities/act1/periodic-table/sugar-on.gif',
				'quartz','','../images/activities/act1/periodic-table/quartz_sand-on.gif',
				'caffeine','','../images/activities/act1/periodic-table/caffeine-on.gif',
				1);
	//return false;
}

//  This is the workaround function for MAC IE 5.1 on OS X
function setPeriodicTable() {
	MM_swapImage('h','','../images/activities/act1/periodic-table/hydrogen-on.gif',
				 'he','','../images/activities/act1/periodic-table/helium-on.gif', 
				 'li','','../images/activities/act1/periodic-table/lithium-on.gif',
				 'be','','../images/activities/act1/periodic-table/beryllium-on.gif',
				 'boron','','../images/activities/act1/periodic-table/boron-on.gif',
	             'c','','../images/activities/act1/periodic-table/carbon-on.gif',
				 'n','','../images/activities/act1/periodic-table/nitrogen-on.gif',
				 'o','','../images/activities/act1/periodic-table/oxygen-on.gif',
				 'fluorine','','../images/activities/act1/periodic-table/fluorine-on.gif',
				 'ne','','../images/activities/act1/periodic-table/neon-on.gif',
				 'na','','../images/activities/act1/periodic-table/sodium-on.gif',
				 'mg','','../images/activities/act1/periodic-table/magnesium-on.gif',
				 'aluminum','','../images/activities/act1/periodic-table/aluminum-on.gif',
				 'silicon','','../images/activities/act1/periodic-table/silicon-on.gif',
				 'phosphorus','','../images/activities/act1/periodic-table/phosphorus-on.gif',
				 'sulfur','','../images/activities/act1/periodic-table/sulfur-on.gif',
				 'cl','','../images/activities/act1/periodic-table/chlorine-on.gif',
				 'ar','','../images/activities/act1/periodic-table/argon-on.gif',
				 'k','','../images/activities/act1/periodic-table/potassium-on.gif',
				 'ca','','../images/activities/act1/periodic-table/calcium-on.gif',
				 'sc','','../images/activities/act1/periodic-table/scandium-on.gif',
				 'ti','','../images/activities/act1/periodic-table/titanium-on.gif',
				 'v','','../images/activities/act1/periodic-table/vanadium-on.gif',
				 'cr','','../images/activities/act1/periodic-table/chromium-on.gif',
				 'mg','','../images/activities/act1/periodic-table/manganese-on.gif',
				 'fe','','../images/activities/act1/periodic-table/iron-on.gif',
				 'co','','../images/activities/act1/periodic-table/cobalt-on.gif',
				 'ni','','../images/activities/act1/periodic-table/nickel-on.gif',
				 'cu','','../images/activities/act1/periodic-table/copper-on.gif',
				 'zinc','','../images/activities/act1/periodic-table/zinc-on.gif',
				 'gallium','','../images/activities/act1/periodic-table/gallium-on.gif',
				 'germanium','','../images/activities/act1/periodic-table/germanium-on.gif',
				 'arsenic','','../images/activities/act1/periodic-table/arsenic-on.gif',
				 'se','','../images/activities/act1/periodic-table/selenium-on.gif',
				 'br','','../images/activities/act1/periodic-table/bromine-on.gif',
				 'kr','','../images/activities/act1/periodic-table/krypton-on.gif',
				 'rb','','../images/activities/act1/periodic-table/rubidium-on.gif',
				 'sr','','../images/activities/act1/periodic-table/strontium-on.gif',
				 'y','','../images/activities/act1/periodic-table/yttrium-on.gif',
				 'zr','','../images/activities/act1/periodic-table/zirconium-on.gif',
				 'nb','','../images/activities/act1/periodic-table/niobium-on.gif',
				 'mo','','../images/activities/act1/periodic-table/molybdenum-on.gif',
				 'tc','','../images/activities/act1/periodic-table/technetium-on.gif',
				 'ru','','../images/activities/act1/periodic-table/ruthenium-on.gif',
				 'rh','','../images/activities/act1/periodic-table/rhodium-on.gif',
				 'pd','','../images/activities/act1/periodic-table/palladium-on.gif',
				 'ag','','../images/activities/act1/periodic-table/silver-on.gif',
				 'cadmium','','../images/activities/act1/periodic-table/cadmium-on.gif',
				 'indium','','../images/activities/act1/periodic-table/indium-on.gif',
				 'sn','','../images/activities/act1/periodic-table/tin-on.gif',
				 'sb','','../images/activities/act1/periodic-table/antimony-on.gif',
				 'te','','../images/activities/act1/periodic-table/tellerium-on.gif',
				 'i','','../images/activities/act1/periodic-table/iodine-on.gif',
				 'xe','','../images/activities/act1/periodic-table/xenon-on.gif',
				 'cs','','../images/activities/act1/periodic-table/cesium-on.gif',
				 'ba','','../images/activities/act1/periodic-table/barium-on.gif',
				 'la','','../images/activities/act1/periodic-table/lanthanum-on.gif',
				 'hf','','../images/activities/act1/periodic-table/hafnium-on.gif',
				 'ta','','../images/activities/act1/periodic-table/tantalum-on.gif',
				 'w','','../images/activities/act1/periodic-table/tungsten-on.gif',
				 're','','../images/activities/act1/periodic-table/rhenium-on.gif',
				 'os','','../images/activities/act1/periodic-table/osmium-on.gif',
				 'ir','','../images/activities/act1/periodic-table/iridium-on.gif',
				 'pt','','../images/activities/act1/periodic-table/platinum-on.gif',
				 'au','','../images/activities/act1/periodic-table/gold-on.gif',
				 'mercury','','../images/activities/act1/periodic-table/mercury-on.gif',
				 'thallium','','../images/activities/act1/periodic-table/thallium-on.gif',
				 'pb','','../images/activities/act1/periodic-table/lead-on.gif',
				 'bismuth','','../images/activities/act1/periodic-table/bismuth-on.gif',
				 'polonium','','../images/activities/act1/periodic-table/polonium-on.gif',
				 'at','','../images/activities/act1/periodic-table/astatine-on.gif',
				 'rn','','../images/activities/act1/periodic-table/radon-on.gif',
				 1);
	return true;
}

function loadMyPage() {
	//if (isIE5 && isMac) {
	//	setAndClearImages();
	//} else {
	MM_preloadImages('../images/activities/act1/periodic-table/hydrogen-on.gif','../images/activities/act1/periodic-table/helium-on.gif','../images/activities/act1/periodic-table/lithium-on.gif','../images/activities/act1/periodic-table/beryllium-on.gif','../images/activities/act1/periodic-table/boron-on.gif','../images/activities/act1/periodic-table/carbon-on.gif','../images/activities/act1/periodic-table/nitrogen-on.gif','../images/activities/act1/periodic-table/oxygen-on.gif','../images/activities/act1/periodic-table/flourine-on.gif','../images/activities/act1/periodic-table/neon-on.gif','../images/activities/act1/periodic-table/sodium-on.gif','../images/activities/act1/periodic-table/magnesium-on.gif','../images/activities/act1/periodic-table/aluminum-on.gif','../images/activities/act1/periodic-table/silicon-on.gif','../images/activities/act1/periodic-table/phosphorus-on.gif','../images/activities/act1/periodic-table/sulfur-on.gif','../images/activities/act1/periodic-table/chlorine-on.gif','../images/activities/act1/periodic-table/argon-on.gif','../images/activities/act1/periodic-table/potassium-on.gif','../images/activities/act1/periodic-table/calcium-on.gif','../images/activities/act1/periodic-table/scandium-on.gif','../images/activities/act1/periodic-table/titanium-on.gif','../images/activities/act1/periodic-table/vanadium-on.gif','../images/activities/act1/periodic-table/chromium-on.gif','../images/activities/act1/periodic-table/manganese-on.gif','../images/activities/act1/periodic-table/iron-on.gif','../images/activities/act1/periodic-table/cobalt-on.gif','../images/activities/act1/periodic-table/nickel-on.gif','../images/activities/act1/periodic-table/copper-on.gif','../images/activities/act1/periodic-table/zinc-on.gif','../images/activities/act1/periodic-table/gallium-on.gif','../images/activities/act1/periodic-table/germanium-on.gif','../images/activities/act1/periodic-table/arsenic-on.gif','../images/activities/act1/periodic-table/selenium-on.gif','../images/activities/act1/periodic-table/bromine-on.gif','../images/activities/act1/periodic-table/krypton-on.gif','../images/activities/act1/periodic-table/rubidium-on.gif','../images/activities/act1/periodic-table/strontium-on.gif','../images/activities/act1/periodic-table/yttrium-on.gif','../images/activities/act1/periodic-table/zirconium-on.gif','../images/activities/act1/periodic-table/niobium-on.gif','../images/activities/act1/periodic-table/molybdenum-on.gif','../images/activities/act1/periodic-table/technetium-on.gif','../images/activities/act1/periodic-table/ruthenium-on.gif','../images/activities/act1/periodic-table/rhodium-on.gif','../images/activities/act1/periodic-table/palladium-on.gif','../images/activities/act1/periodic-table/silver-on.gif','../images/activities/act1/periodic-table/cadmium-on.gif','../images/activities/act1/periodic-table/indium-on.gif','../images/activities/act1/periodic-table/tin-on.gif','../images/activities/act1/periodic-table/antimony-on.gif','../images/activities/act1/periodic-table/tellurium-on.gif','../images/activities/act1/periodic-table/iodine-on.gif','../images/activities/act1/periodic-table/xenon-on.gif','../images/activities/act1/periodic-table/cesium-on.gif','../images/activities/act1/periodic-table/barium-on.gif','../images/activities/act1/periodic-table/lanthanum-on.gif','../images/activities/act1/periodic-table/hafnium-on.gif','../images/activities/act1/periodic-table/tantalum-on.gif','../images/activities/act1/periodic-table/tungsten-on.gif','../images/activities/act1/periodic-table/rhenium-on.gif','../images/activities/act1/periodic-table/osmium-on.gif','../images/activities/act1/periodic-table/iridium-on.gif','../images/activities/act1/periodic-table/platinum-on.gif','../images/activities/act1/periodic-table/gold-on.gif','../images/activities/act1/periodic-table/mercury-on.gif','../images/activities/act1/periodic-table/thallium-on.gif','../images/activities/act1/periodic-table/lead-on.gif','../images/activities/act1/periodic-table/bismuth-on.gif','../images/activities/act1/periodic-table/polonium-on.gif','../images/activities/act1/periodic-table/astatine-on.gif','../images/activities/act1/periodic-table/radon-on.gif','../images/activities/act1/periodic-table/salt-on.gif','../images/activities/act1/periodic-table/chalk-on.gif','../images/activities/act1/periodic-table/ammonia-on.gif','../images/activities/act1/periodic-table/chlorophyll-on.gif','../images/activities/act1/periodic-table/humans-on.gif','../images/activities/act1/periodic-table/water-on.gif','../images/activities/act1/periodic-table/sugar-on.gif','../images/activities/act1/periodic-table/quartz_sand-on.gif','../images/activities/act1/periodic-table/caffeine-on.gif','../images/nav/main_on.gif','../images/nav/intro_on.gif','../images/nav/student_on.gif','../images/nav/guide_on.gif','../images/nav/about_on.gif');
	//}
}

//-->
