Question

The mass number of a chromium atom is 52 and it has 24 protons. How many neutrons does this atom have?

Answer 1

neutron=mass no. - proton(atomic no.)
no.of neutron =52-24=28

Answer 2

Answer: number of neutrons = 28

Explanation: Atomic number is equal to the number of protons.

Mass number is the sum of number of neutrons and number of protons.

Given : no of protons = atomic number = 24

Mass number =  number of neutrons + number of protons

Number of neutrons = Mass number - number of protons = 52-24= 28

The atomic number is specific to an element, and the element with atomic number 24 is . The representation is $_{24}^{52}\textrm {Cr}$