Question

Which of the following is true about Chlorine when it becomes an ion?
Responses

Cl will lose 1 electron which gives it a charge of +1
Cl will lose 1 electron which gives it a charge of +1

Cl will lose 1 electron which gives it a charge of -1
Cl will lose 1 electron which gives it a charge of -1

Cl will gain 1 electron which gives it a charge of +1
Cl will gain 1 electron which gives it a charge of +1

Cl will gain 1 electron which gives it a charge of -1

Answer 1

Cl will gain 1 electron which gives it a charge of -1.

Explanation: neutral Cl has 17 protons and 17 electrons (7 valence electrons). By gaining one electron it becomes Cl⁻ (18 electrons), achieving an octet and a net −1 charge (common in compounds like NaCl).