One of the most abundant elements on our planet and in the human body is oxygen, in particular the isotope oxygen-16. With eight protons and eight neutrons, oxygen-16 has an extremely stable nucleus.

Protons are tiny subatomic particles that, along with neutrons, form the nucleus of an atom. The heavier the atom, the more protons (and neutrons) it contains.

Protons Pair Up With Neutrons: Finding Sheds New Light On Structure Of Nuclear Systems Date: June 3, 2008 Source: DOE/Thomas Jefferson National Accelerator Facility Summary: New research has found ...

Electrons are tiny compared to protons and neutrons, over 1,800 times smaller than either a proton or a neutron. Electrons are about 0.054% as massive as neutrons, according to Jefferson Lab.