Question

What is the atomic number of $\mathrm{K}$?

Answer 1

Atomic number

• The number of protons present in the nucleus of an atom is equal to the atomic number.
• The atomic number is represented as Z.

The formula for the calculation of atomic number is as follows.

$\text{Atomic number}\left(\text{Z}\right)\text{= Number of protons in the nucleus of an atom = Number of electrons in a neutral atom}$

Atomic number of potassium$\left(\mathrm{K}\right)$

• The number of protons in the nucleus of potassium (K) atom is $19$.
• So, the atomic number of potassium is $19$.