Chapter SH, Problem 20.1APP

To determine

To calculate: Number of protons in the nucleus of given atom.

Answer to Problem 20.1APP

Number of protons is 36

Explanation of Solution

Given:

The following nucleus:

  $\text{K}\text{r}$

Calculation:

According to the given nucleus,

Mass number = 81

Atomic number = 36

Since number of protons is equal to atomic number, number of protons is $36$ .

Conclusion:

Number of protons is 36.