Explain why the boiling point of water is a characteristic physical property, but the temperature and the volume of a glass of water are not.

Physical property does not change given substance chemically. When we boil the a water, which changes to steam which is still a water as a gas. Therefore boiling water is physical property and temperature and volume are not.

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answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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