Question

If an atom has 11 electrons, how many protons it will have?

Answer 1

Answer:

Mass number

This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass).

Answer 2

Answer:

It will have 11 protons as the number of electrons=number of protons

Explanation:

Hope it helps :D