Question

An element X consists of 20 protons and 20 neutrons. Mention the atomic number and mass number, and represent the element with atomic number and mass number.​

Answer 1

Answer:

Given:-

Number of protons = 20

Number of neutrons = 20

Atomic number = Number of protons = 20

Mass number = Number of protons + number of neutrons

= 20+20

= 40

The element with atomic number 20 and mass number 40 is Calcium (Ca)