Question

The number of valence electrons of Barium is

• A. 6
• B. 1
• C. 2
• D. 3

Answer 1

The correct option is C

2

Answer: Option (C)

Explanation of correct option.

1. The Number of electrons present in the last shell an of the atom is called the valence electron.
2. The group number is equal to the number of valence electrons.
3. Since the Barium (Ba₅₆) belongs to the second group, therefore, it has 2 valence electrons.

Explanation of Incorrect option.

Since the barium (Ba₅₆) belongs to the second group, therefore, it cannot be 6, 1 and 3, hence options a), b) and d) are wrong.

Conclusion.

The group number is equal to the number of valence electrons. Since the barium (Ba₅₆) belongs to the second group, therefore, it has 2 valence electrons. Therefore option (C) is correct.