Which explanation best finishes this sentence? Intensity is the measure of... 1. the amount of energy in sound waves.

2. how close the waves are together vertically (side to side).

3. the total amount of change from one wave to the next.

Either 1. the amount of energy in sound waves.

or 3. the total amount of change from one wave to the next.

Tell me which one is right please.

1?

Explanation:

Fluorine (atomic number 9) contains 9 protons and 9 electrons. Fluorine forms a 1─ ion by gaining 1 electron, giving the ion a total of 10 electrons.