Caesium, $C s$ , is an element in Group I of the Periodic Table.
When caesium reacts it forms a positive ion, $C s^{+}$ .
How is a caesium ion formed?

A caesium atom gains a proton

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A caesium atom gains an electron

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A caesium atom loses an electron

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A caesium atom shares an electron

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Solution

The correct option is C A caesium atom loses an electron
Solution:- (C) A caesium atom loses an electron
Caesium is an alkali metal belongs to group $I$ and have only one electron in it's valence shell and thus when reacts, it loses that one valence electron and forms ${C s}^{+}$ ion.

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Caesium, Cs, is an element in Group I of the Periodic Table.When caesium reacts it forms a positive ion, Cs+.How is a caesium ion formed?

The correct option is C A caesium atom loses an electronSolution:- (C) A caesium atom loses an electronCaesium is an alkali metal belongs to group I and have only one electron in it's valence shell and thus when reacts, it loses that one valence electron and forms Cs+ ion.

Caesium, $C s$ , is an element in Group I of the Periodic Table.
When caesium reacts it forms a positive ion, $C s^{+}$ .
How is a caesium ion formed?

The correct option is C A caesium atom loses an electron
Solution:- (C) A caesium atom loses an electron
Caesium is an alkali metal belongs to group $I$ and have only one electron in it's valence shell and thus when reacts, it loses that one valence electron and forms ${C s}^{+}$ ion.