WCH11 October 2022

3​​ An atom of​​ N715​​ forms a nitride ion, N3–.

What are the numbers of protons, neutrons and electrons in this ion?

ANSWER

C 7 Protons, 8 Neutrons and 10 Electrons.

Analysis of Option/Explanation

When seeing​​ N715, it is clear that number of protons =7, number of electron=7 and neutron = 8. But​​ when the N3-​​ ion is formed the number of proton remains the same, i.e. =7, but the number of neutron increases to 10 (7 + 3), hence option C is the correct answer.