A nitride ion has 7 protons, 8 neutrons, and 10 electrons. What is the overall charge on this ion?

A. -3
B. -2
C. 0
D. +3



Answer :

To determine the overall charge on the nitride ion, we need to consider the number of protons and electrons it has. Here are the detailed steps:

1. Identify the charges of protons and electrons:
- Each proton carries a charge of [tex]\( +1 \)[/tex].
- Each electron carries a charge of [tex]\( -1 \)[/tex].

2. Count the number of protons and electrons in the nitride ion:
- The nitride ion has 7 protons.
- The nitride ion has 10 electrons.

3. Calculate the total positive charge contributed by the protons:
- Total charge from protons = [tex]\( 7 \times (+1) = +7 \)[/tex].

4. Calculate the total negative charge contributed by the electrons:
- Total charge from electrons = [tex]\( 10 \times (-1) = -10 \)[/tex].

5. Determine the overall charge of the ion:
- Overall charge = Total charge from protons + Total charge from electrons.
- Overall charge = [tex]\( +7 + (-10) = +7 - 10 = -3 \)[/tex].

Therefore, the overall charge on the nitride ion is [tex]\(-3\)[/tex].

So, the correct answer is:
[tex]\[ -3 \][/tex]