Question

The atomic number of an element X is 16. The symbol of ion formed by an atom of this element will be ______.

Options

• X²⁺

• X³⁺

• X²⁻

• X⁻

Answer 1

The atomic number of an element X is 16. The symbol of ion formed by an atom of this element will be X²⁻.

Explanation:

Element X has an atomic number of 16, which gives it an electronic configuration of 2, 8, 6. Since it has 6 valence electrons, it needs to gain 2 more electrons to achieve a stable octet configuration. Gaining two negatively charged electrons adds a 2− charge to the atom, resulting in the formation of the X²⁻ ion.