Why molecule of nitrogen and CO have same no of electron proton and neutron?

Nitrogen (N₂) and carbon monoxide (CO) have the same total number of protons, electrons, and neutrons because they both consist of two atoms. Nitrogen has 7 protons and 7 neutrons per nitrogen atom, while carbon has 6 protons and oxygen has 8 protons. In CO, carbon has 6 protons and 6 neutrons (in its most common isotope), while oxygen has 8 protons and typically 8 neutrons. The total counts of protons and neutrons in both molecules can be compared, but their individual atomic compositions differ, leading to different molecular properties.