The CORRECT answers are: lose 2, gain1, lose1, not form an ion, lose 3
The number of electrons each atom must gain or lose to have a full valence level is as follows:
Calcium → lose 2 electrons
Fluorine → gain 1 electrons
Lithium → lose 1 electrons
Argon → it remain same
Aluminium → lose 3 electrons
Valency Electron
The valency electron of an atom determines the number of electron(s) an atom gains or lose.
The atom gain or lose electron(s) to fulfil the octet rule.
Therefore, the following atoms will lose or gain electrons as follows:
using the model 2 8 8 2 ,
Calcium atoms has 20 electron and it has 2 valency electrons (2 8 8 2).
For it to have a full valence level it will lose 2 electrons(2 8 8).
Fluorine atoms has 9 electrons and it has 7 valency electrons (2 7). For it
to have a full valence level it will gain 1 electrons(2 8).
Lithium atoms has 3 electron and it has 1 valency electrons (2 1). For it
to have a full valence level it will lose 1 electrons(2).
Argon atoms has 18 electron and it has 8 valency electrons (2 8 8 ). For it
to have a full valence level it will lose or gain no electrons(2 8 8)
Aluminium atoms has 13 electron and it has 3 valency electrons (2 8 3).
For it to have a full valence level it will lose 3 electrons(2 8).
For more about Periodic Table, access :
https://brainly.com/question/7431084?referrer=searchResults
