Question

The atomic number of krypton (Kr) is 36, and its mass number is 84. How many neutrons does It have?

O A
18
OB
36
Oc.
48
OD
72

Answer 1

Step-by-step explanation:

We are given with the atomic number (36) which means that we have 36 protons and 36 electrons. Using this information, we can get the number of neutrons. Recall that mass number is equal to the sum of the protons and neutrons in the atomic nucleus. Therefore, there are 48 neutrons in Krypton-84.

Answer 2

The answer is 48 neutrons