Question

number of neutrons for the first 20 elements

Answer 1

Answer:

Terms in this set (20)

Hydrogen, H. 1 proton, 1 electron, 0 neutrons.

Helium, He. 2 protons, 2 electrons, 2 neutrons.

Lithium, Li. 3 protons, 3 electrons, 4 neutrons.

Beryllium, Be. 4 protons, 4 electrons, 5 neutrons.

Boron, B. 5 protons, 5 electrons, 6 neutrons.

Carbon, C. 6 protons, 6 electrons, 6 neutrons.

Nitrogen, N. ...

Oxygen, O.

Explanation: