# Question #06bb1

Oct 11, 2016

100

#### Explanation:

The atomic mass of an element can be thought of as the number of protons + the number of neutrons. The atomic number of an element equals the amount of protons it has. Using this, we see that the number of neutrons can be calculated by subtracting the atomic number from the atomic mass. In this case, we get $153 - 53 = 100$.

Oct 11, 2016
1. Sure to be very unstable !

#### Explanation:

Number of neutrons + number of protons (atomic number) = mass number
so 100 + 53 = 153