Lesson: Chapter 10 — Chemical Bonds

10.1. Ionic bonds 1 of 10 Reset answers

Clear all your answers?

This erases every answer in this set and starts you again at question one. Your score will be gone.

Type these four numbers to confirm:

Those numbers don't match. Look at them again and type them.

Yes, clear Keep them

Question 1

A sodium atom has 11 protons and 11 electrons. How many electrons does the Na⁺ ion have?

A 10 B 11 C 12 D 1

The right answer is the one marked above.

10. The ion forms by releasing one electron, leaving 11 protons against 10 electrons — hence the +1 charge.

11 is the count before the electron leaves. 12 would mean the ion gained an electron, which would make it negative. 1 is the number of electrons lost, not the number remaining.

Answer the question to continue.