Question

Atomic number is the number of protons present in the nucleus of an atom of an element.

• A. True
• B. False

Answer 1

The correct option is A True

Atomic number is the number of protons present in the nucleus of an atom of an element.
Example:

• The nucleus of hydrogen atom contains 1 proton and hence, the atomic number of hydrogen is 1.
• The nucleus of carbon atom has 6 protons and hence, the atomic number of carbon is 6.

In an uncharged atom, the atomic number is also equal to the number of electrons.