Question

The atomic number of three elements A, B and C are 7,10 and 11 respectively. Which of
them will form a cation? Give reason for your answer


pls help me guys

Answer 1

Answer:

C will form a cation.

Explanation:

Elements can lose or gain electron to get noble gas configuration (2, 8, 18 electrons in valence shell and so on).

A will gain 3 electrons to get 10 electrons [(2,8) is Neon gas] (forms anion).

B is already a noble gas (2,8) configuration i.e Neon. It won't form any ion.

C will lose one electron to get 10 electrons to form cation. It attains Neon gas configuration.