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| style="height:20px; width:300px; text-align:center;" |A [[Fluorine]] [[atom]] has 9 [[proton]]s and 9 [[electron]]s so it is [[Neutral Charge|neutral]].
| style="height:20px; width:300px; text-align:center;" |A [[Fluorine]] [[ion]] has 9 [[proton]]s and 10 [[electron]]s so it is [[Negative Charge|negative charge]]. It now has a full [[Outer Shell]].
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: The number of [[electron]] in an [[ion]] can be found using the [[Atomic Number]] (which is the same as the [[Relative Atomic Charge]] of the [[Atomic Nucleus|nucleus]]) and subtracting the [[charge]] of the [[ion]].
{| class="wikitable"
| style="height:20px; width:200px; text-align:center;" |'''A Lithium Ion'''
| style="height:20px; width:200px; text-align:center;" |'''A Fluorine Ion'''
| style="height:20px; width:200px; text-align:center;" |'''A Boron Ion'''
| style="height:20px; width:200px; text-align:center;" |'''An Oxygen Ion '''
|-
|[[File:LithiumIonSymbol.png|center|200px]]
|[[File:FluorineIonSymbol.png|center|200px]]
|[[File:BoronIonSymbol.png|center|200px]]
|[[File:OxygenIonSymbol.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 4 and a [[Relative Atomic Mass]] (A) of 9.
Number of [[neutron]]s = A - Z
Number of [[neutron]]s = 9 - 4
Number of [[neutron]]s = 5
|}