Scientists are working with a liquid that is made of only one type of atom. Which statements correctly describe this liquid? Select two options.
The liquid contains only one compound.
The liquid contains only one element.
The liquid contains only neutral electrons.
The liquid is a pure substance.
The liquid can be broken down into simpler substances.
The liquid must have equal numbers of neutrons and protons.

one state would change   like louisiana to texas. thats a change

explanation:

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.

a electronegativity decreases beacuse the size of nucleus is bigger.