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→About Neutrons
{| class="wikitable"
| style="height:20px; width:200px150px; text-align:center;" |'''Hydrogen'''| style="height:20px; width:200px150px; text-align:center;" |'''Helium'''| style="height:20px; width:200px150px; text-align:center;" |'''Lithium'''| style="height:20px; width:200px150px; text-align:center;" |'''Beryllium'''
|-
|[[File:HydrogenSymbol.png|center|200px150px]]|[[File:HeliumSymbol.png|center|200px150px]]|[[File:LithiumSymbol.png|center|200px150px]]|[[File:BerylliumSymbol.png|center|200px150px]]
|-
| style="height:20px; width:200px150px; 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 = 0
| style="height:20px; width:200px150px; 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 = 2
| style="height:20px; width:200px150px; 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 = 4
| style="height:20px; width:200px150px; text-align:left;" |This [[atom]] has an [[Atomic Number]] (Z) of 4 and a [[Relative Atomic Mass]] (A) of 9.
Number of [[neutron]]s = A - Z