Question

The number of protons in the nucleus of one atom of an element Y is 5. The symbol of ion formed by an atom of this element will be ______.

Options

• Y³⁻

• Y²⁺

• Y²⁻

• Y³⁺

Answer 1

The number of protons in the nucleus of one atom of an element Y is 5. The symbol of ion formed by an atom of this element will be Y³⁺.

Explanation:

An atom with 5 protons has an atomic number of 5, giving it an electronic configuration of 2, 3. To achieve a stable, filled outer shell, this element needs to lose its 3 valence electrons rather than trying to gain 5. Losing three negatively charged electrons leaves the atom with a net positive charge of +3, forming the Y³⁺ ion.