Question

Match the following elements with their respective atomic numbers.

• A. 11
• B. 1
• C. 3
• D. 8

Answer 1

The number of protons present in the nucleus is known as the atomic number. It is denoted by the letter Z.

Elements with their atomic numbers are given below:
$$\begin{array}{ccc}\text{Elements}& \text{No. of protons}& \text{Atomic number (Z)}\\ \text{Hydrogen}& 1& \text{1}\\ \text{Sodium}& 11& \text{11}\\ \text{Lithium}& 3& \text{3}\\ \text{Oxygen}& 8& \text{8}\end{array}$$