An atom that is identified by the number of protons and neutrons in its nucleus; a general term for a specific isotope of an element, is called?

necleon

Explanation:

it is a proton or neutron found in neucleus

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.