Question

Which of the following statement is always correct?

• A. An atom has an equal number of electrons and protons.
• B. An atom has an equal number of electrons and neutrons
• C. An atom has equal number of protons and neutrons
• D. An atom has equal number of electrons protons and neutrons

Answer 1

The correct option is A

An atom has an equal number of electrons and protons.

The correct option is (A).

Explanation of the correct option:

1. An atom is electrically neutral which means the positive charge in the nucleus of an atom balances the negative charge of the electrons.
2. Thus the number of protons and electrons in an atom is always equal to maintain its neutrality and stability.

Hence, An atom has an equal number of electrons, and protons are always correct.