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==Key Stage 4==
===Meaning===
The [[Neutron]] is a [[Neutral Charge|neutral]] [[particle]] found in the [[Atomic Nucleus|nucleus]] of an [[atom]].
===About Neutrons===
: [[Neutron]]s are a type of [[nucleon]].
: [[Neutron]]s have a [[Relative Atomic Charge|relative atomic charge]] of 0 and a [[Relative Atomic Mass|relative atomic mass]] of 1.
: The number of [[neutron]]s in an [[atom]] can be found subtracting the [[Atomic Number]] from the [[Relative Atomic Mass]].
{| 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: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:left;" |This [[atom]] has an [[Atomic Number]] (Z) of 1 and a [[Relative Atomic Mass]] (A) of 1.
Number of [[neutron]]s = A - Z
Number of [[neutron]]s = 1 - 1
Number of [[neutron]]s = 0
| style="height:20px; width:200px; text-align:left;" |This [[atom]] has an [[Atomic Number]] (Z) of 2 and a [[Relative Atomic Mass]] (A) of 4.
Number of [[neutron]]s = A - Z
Number of [[neutron]]s = 4 - 2
Number of [[neutron]]s = 2
| style="height:20px; width:200px; text-align:left;" |This [[atom]] has an [[Atomic Number]] (Z) of 3 and a [[Relative Atomic Mass]] (A) of 7.
Number of [[neutron]]s = A - Z
Number of [[neutron]]s = 7 - 3
Number of [[neutron]]s = 4
| style="height:20px; width:200px; text-align:left;" |This [[atom]] has an [[Atomic Number]] (Z) of 1 and a [[Relative Atomic Mass]] (A) of 1.
Number of [[neutron]]s = A - Z
Number of [[neutron]]s = 1 - 1
Number of [[neutron]]s = 0
|}