Question

Choose all the answers that apply.
Which of the following is an example of an ion?

Ar
Na+
F+
CI-

Answer 1

Answer:

Cl- and Na+

Explanation:

ions are the elements which have become stable.

(atom needs to have 8 electrons in its valence shell to become stable)

Ar is already stable as it's a noble gas do it's not an ion.

Na has electronic configuration (2,8,1) so it needs to lose 1 electron to become stable. When it will lose its 1 electron it will become Na+ (2,8) ion.

F has electronic configuration (2,6) so it needs to gain 2 electrons to become stable. When it will gain 2 electrons it will become F²- (2,6) ion.

(as gaining electron increases negative charge of atom)

Cl has electronic configuration (2,8,7) so it needs to gain 1 electron to become stable. When it will gain 1 electron it will become Cl- (2,8,8) ion.