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Created page with "==Key Stage 3== ===Meaning=== right|400px|thumb|An [[element tile showing the Atomic Number.]] The Atomic Number is the number of protons..."
==Key Stage 3==
===Meaning===
[[File:ElementTile.png|right|400px|thumb|An [[element]] tile showing the [[Atomic Number]].]]
The [[Atomic Number]] is the number of [[proton]]s in the [[nucleus]] of an [[atom]].
===About The Atomic Number===
: The [[Atomic Number]] of an [[atom]] determines which [[element]] it is.
: The number of [[proton]]s also determines the number of [[electron]]s.
===Examples===
{| class="wikitable"
| style="height:20px; width:200px; text-align:center;" |'''Hydrogen'''
| style="height:20px; width:200px; text-align:center;" |'''Helium'''
| style="height:20px; width:200px; text-align:center;" |'''Lithium'''
| style="height:20px; width:200px; text-align:center;" |'''Beryllium'''
|-
|[[File:Hydrogen.png|center|200px]]
|[[File:Helium.png|center|200px]]
|[[File:Lithium.png|center|200px]]
|[[File:Beryllium.png|center|200px]]
|-
|[[File:HydrogenSymbol.png|center|200px]]
|[[File:HeliumSymbol.png|center|200px]]
|[[File:LithiumSymbol.png|center|200px]]
|[[File:BerylliumSymbol.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Hydrogen]] has 1 [[proton]] so its '''atomic number''' is 1.
| style="height:20px; width:200px; text-align:center;" |[[Helium]] has 2 [[proton]]s so its '''atomic number''' is 2.
| style="height:20px; width:200px; text-align:center;" |[[Lithium]] has 3 [[proton]]s so its '''atomic number''' is 3.
| style="height:20px; width:200px; text-align:center;" |[[Beryllium]] has 4 [[proton]]s so its '''atomic number''' is 4.
|}
===Meaning===
[[File:ElementTile.png|right|400px|thumb|An [[element]] tile showing the [[Atomic Number]].]]
The [[Atomic Number]] is the number of [[proton]]s in the [[nucleus]] of an [[atom]].
===About The Atomic Number===
: The [[Atomic Number]] of an [[atom]] determines which [[element]] it is.
: The number of [[proton]]s also determines the number of [[electron]]s.
===Examples===
{| class="wikitable"
| style="height:20px; width:200px; text-align:center;" |'''Hydrogen'''
| style="height:20px; width:200px; text-align:center;" |'''Helium'''
| style="height:20px; width:200px; text-align:center;" |'''Lithium'''
| style="height:20px; width:200px; text-align:center;" |'''Beryllium'''
|-
|[[File:Hydrogen.png|center|200px]]
|[[File:Helium.png|center|200px]]
|[[File:Lithium.png|center|200px]]
|[[File:Beryllium.png|center|200px]]
|-
|[[File:HydrogenSymbol.png|center|200px]]
|[[File:HeliumSymbol.png|center|200px]]
|[[File:LithiumSymbol.png|center|200px]]
|[[File:BerylliumSymbol.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Hydrogen]] has 1 [[proton]] so its '''atomic number''' is 1.
| style="height:20px; width:200px; text-align:center;" |[[Helium]] has 2 [[proton]]s so its '''atomic number''' is 2.
| style="height:20px; width:200px; text-align:center;" |[[Lithium]] has 3 [[proton]]s so its '''atomic number''' is 3.
| style="height:20px; width:200px; text-align:center;" |[[Beryllium]] has 4 [[proton]]s so its '''atomic number''' is 4.
|}