Question

The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are ______.

Options

• 16, 5 and 2

• 15, 5 and 3

• 16, 6 and 3

• 15, 6 and 2

Answer 1

The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are 15, 5 and 3.

Explanation:

Phosphorus has an atomic number of 15. Its group number is 15, the number of valence electrons is 5 and the valency is 3.