Chapter 30, Problem 4Q

To determine

Elements which has 87 nucleons and 50 neutrons

Answer to Problem 4Q

Solution:

Rubidium

Explanation of Solution

Element With 87 nucleons and 50 neutrons,

We have to find the number of protons, which is given by ${}_Z{}^{A}X$ this form.

Where Z is the number of protons in the element

A is the mass number, which is the number of protons plus the number of neutrons.

X is the chemical symbol of the element, and it must correspond to the atomic number.

The number proton is 87-50= 37

37 is the atomic number, so the element is rubidium.