Question

Atomic number of strontium $\left(Sr\right)$ is equal to:

• A. 28
• B. 38
• C. 42
• D. 34

Answer 1

The correct option is B 38

The number of protons found in the nucleus of an atom of a given element is called atomic number. Elements are placed in periodic table according to their atomic number.

Example:-

(i) Atomic number of Strontium:- $83$

${}_{38}^{87.62}Sr$

(ii) Atomic number of Rubidium:- $37$

${}_{37}^{85.4}Rb$