In the nucleus of (20Ca^{40}) there are | CHEMISTRY - ATOMIC MODELS | SolveeIt | Solveeit

Today, August 24

Question

In the nucleus of $20Ca^{40}$ there are

A

40 protons and 20 electrons

B

20 protons and 40 electrons

C

20 protons and 20 neutrons

D

20 protons and 40 neutrons

Answer

20 protons and 20 neutrons

Explanation

Solution

$P =$ 20, mass no. (1) = 40

$\mathbf{N =}$ A–P = $40 - 20 = 20$

$P = N = 20.$