Which of the following are ALL examples of physical changes? Iron Rusting, Milk Souring, Frying Compression, Condensation, Melting An explosion, Sublimation, Condensation Burning, Boiling, Sublimation​

i'm not sure

explanation:

i'll try whatever you got

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.