Question

Part A

Answer 1

Answer:

All isotopes have 24 protons.

Explanation:

Isotope:

The isotope of an element have same number of protons but different number of neutrons.

In given question chromium has four isotopes Cr-50, Cr-52, Cr-53 and Cr-54.

In each isotope the number of protons are 24 but the number of neutrons are different.

The number of protons are also equal to the number of neutrons and it is also the atomic number so the atomic number of all chromium isotope is same.

The number of neutrons in Cr-50 = 50-24= 26

So, chromium 50 has 26 neutrons.

The number of neutrons in Cr-52 = 52-24= 28

So, chromium 52 has 28 neutrons.

The number of neutrons in Cr-53 = 53-24= 29

So, chromium 53 has 29 neutrons.

The number of neutrons in Cr-54 = 54-24= 30

So, chromium 54 has 30 neutrons.