// Quantum Model - Quantum Numbers Script

//updated 11/14/00-added complete solution
thepage="Atomic Theory - Quantum Numbers"
//updated 12/02/02-netscape 7
//refnumber=42
attempts=0
totl=0
corrt=0
theanswr=""
theanswer=""
symbols=new Array("s","p","d","f","g","h","i","j","k")
theform=new Array()
theform[0]="<form><input type=text size=8 name='theans' value=''><input type='button' value='Check Answer' onClick='answer(this.form.theans.value)'></form>"
theform[1]="<form><input type=radio name='theans' onClick='answer(0)'><b>Y<input type='radio' name='theans' onClick='answer(1)'>N</b></form>"
function cleanse(){
	clear()
	document.forms[0].total.value=0
	document.forms[0].correct.value=0
}
function clear(){
	document.forms[0].results.value=""
	clearansspot()
	tried=0
	attempts=0
}
function question(p1,p2,p3,p4,p5){
	this.p1=p1
	this.p2=p2
	this.p3=p3
	this.p4=p4
	this.p5=p5
}
quest=new Array(10)
ansphrase=new Array()
quest[0]=new question("For a principle quantum number,n, equal to "," ,what is largest allowed value of l?","")
ansphrase[0]=new Array("The largest allowed value of l equals n-1. In this case that would be ")
quest[1]=new question("For a principle quantum number,n, equal to "," ,is it possible for l to be equal to ","(Y or N)?","")
ansphrase[1]=new Array("l has allowed values from 0 to n-1. Since, in this case, the value of l is "," that range, the answer is ")
quest[2]=new question("For a principle quantum number,n, equal to "," ,what is the total<br>number of orbitals permitted?","")
ansphrase[2]=new Array("The total number of orbitals at a given principal quantion level is n<sup>2</sup>. In this case that would be ")
quest[3]=new question("For a principle quantum number,n, equal to "," ,what is the total<br>electron capacity of that level?","")
ansphrase[3]=new Array("The total electron capacity is 2*n<sup>2</sup>. In this case that equals ")
quest[4]=new question("For the quantum number,l, equal to "," is an m<sub>l</sub> value of "," permitted(Y or N)?")
ansphrase[4]=new Array("m<sub>l</sub> values must be integers in the range -l..0..+l. Since, in this case, the value of m<sub>l</sub> is "," that range, the answer is ")
quest[5]=new question("For the quantum number,l, equal to "," ,how many orbitals of that type<br>are permitted?","")
ansphrase[5]=new Array("The number of orbitals for a given value of l is 2*l+1. This case, that is ")
quest[6]=new question("Is the<b> ","</b> orbital permitted(Y or N)?","")
ansphrase[6]=new Array("The value of l must be less than or equal to n-1. Here, n="," and l="," so the answer is ")
quest[7]=new question("What is the l quantum number for an <b>","</b> orbital?","")
ansphrase[7]=new Array("Here you have to know how the symbols correlate with the values of l. An "," orbital correspnds to an l value of ")
quest[8]=new question("What is the correct representation for an orbital which has an n value of "," and an l value of ","?")
ansphrase[8]=new Array("")
thedata=0
qarray=new Array(0,9,0,1,0,9,0,9,1,2,1,9,4,9,3,9,0,1)
farray=new Array(0,1,0,0,1,0,1,0,0)
function startit(){
	clear()
	totl++
	document.forms[0].total.value=totl
	thedata=new Array()
	thedata[0]=Math.ceil(9*Math.random())
	thedata[1]=Math.floor(9*Math.random())
	thedata[2]=Math.floor(9*Math.random())
	thedata[3]=symbols[thedata[1]]
	thedata[4]=thedata[0]+symbols[thedata[1]]
	thedata[9]=""
	if(Math.random()>.5){thedata[2]=-thedata[2]}
	buildquestion()
}
function buildquestion(n,l,ml){
//select the question
	h=Math.floor(9*Math.random())
	if(h==0){
		theanswr=thedata[0]-1
	}
	if(h==1){
		if(thedata[1]<=thedata[0]-1){theanswr=0}
		else{theanswr=1}
	}
	if(h==2){
		theanswr=thedata[0]*thedata[0]
	}
	if(h==3){
		theanswr=2*thedata[0]*thedata[0]
	}
	if(h==4){
		if(Math.abs(thedata[2])<=thedata[1]){theanswr=0}
		else{theanswr=1}
	}
	if(h==5){
		theanswr=2*thedata[1]+1
	}
	if(h==6){
		if(thedata[1]<=thedata[0]-1){theanswr=0}
		else{theanswr=1}
	}
	if(h==7){
		theanswr=thedata[1]
	}
	if(h==8){
		if(thedata[1]>=thedata[0]){startit()}
		else{
			theanswr=thedata[4]
	}}
//now compose the question
	thequest=quest[h].p1+thedata[qarray[2*h]]+quest[h].p2+thedata[qarray[2*h+1]]+quest[h].p3+"<br>"+theform[farray[h]]
	showquest(thequest)
	buildanswer(h)
}
function buildanswer(h){
	theanswer=ansphrase[h][0]
	if(h==0 || h==2 || h==3 || h==5 ||h==8){
		theanswer+=theanswr
	}
	else{
		if(h==1){
			thedata[1]<thedata[0]?theanswer+=("within"+ansphrase[h][1]+"Y"):theanswer+=("outside"+ansphrase[h][1]+"N");
	}
		if(h==4){
			Math.abs(thedata[2])<=thedata[1]?theanswer+="within"+ansphrase[h][1]+"Y":theanswer+="outside"+ansphrase[h][1]+"N";
	}
		if(h==6){
			theanswer+=thedata[0]+ansphrase[h][1]+thedata[1]+ansphrase[h][2]
			thedata[1]<thedata[0]?theanswer+="Y":theanswer+="N";
	}
		if(h==7){
			theanswer+=thedata[3]+ansphrase[h][1]+thedata[1]
	}
	}
}

function answer(ans){
	if(tried==1)alert("You've done this one. Get a new problem!")
	else{
	if(tried==2){totl++;document.forms[0].total.value=totl}
	if(ans==theanswr){
		document.forms[0].results.value="correct"
		corrt++
		document.forms[0].correct.value=corrt
		tried=1
	}
	else{
		document.forms[0].results.value="incorrect"
		tried=2
		attempts=3
		showanswer()
	}}
}