Question

what integer represents the total charge of 4 protons?
4
what integer represents the total charge of 7 electrons?
-7
what integer represents the total charge of 9 neutrons?

Explanation:

Step1: Recall the charge of a neutron

A neutron has a charge of \(0\).

Step2: Calculate the total charge of 9 neutrons

If one neutron has a charge of \(0\), then for \(n = 9\) neutrons, the total charge \(Q\) is given by \(Q=9\times0\).

Using the multiplication property \(a\times0 = 0\) for any real number \(a\), we have \(Q = 0\).

Answer:

\(0\)