Question

1. which of the following atoms is unlikely to form a stable ion by losing an electron?

a. rb
c. na
b. li
d. cl

Explanation:

Step1: Analyze the nature of elements

Metals tend to lose electrons to form cations. Rb (Rubidium), Li (Lithium), and Na (Sodium) are alkali metals. They have one valence electron and readily lose it to achieve a stable electron configuration.

Step2: Analyze the nature of Cl

Cl (Chlorine) is a non - metal. Non - metals tend to gain electrons to form anions. Chlorine has 7 valence electrons and is more likely to gain 1 electron to complete its octet rather than lose an electron.

Answer:

d. Cl