A mixture of 143.7 g of P and 148.5 g of O 2 reacts completely to form P 4 O 6 and P 4 O 10 . Find the masses of P 4 O 6 and P 4 O 10 that are formed by the reaction.

a chemical reaction

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.

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c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.