Question

The atomic number of an element is $7$. This implies that its nucleus contains :

• A. $7$ electrons
• B. $7$ protons
• C. $7$ neutrons
• D. $7$ protons and $7$ electrons

Answer 1

The correct option is B $7$ protons

The atomic number represents or stands for the distinct identity of a chemical element.

It is usually defined as the number or protons present in an atom of an element, which is also equal to the number of electrons present in neutral atom.

Nucleus contain only proton and nuetron not the electrons.