The moon can be observed easily because it is so close to Earth. What happens to the moon throughout the month? A. Its appearance changes.
B. Its color changes.
C. It gets dimmer.
D. It grows larger.

answer: c.

explanation:

the answer is b. dilution

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.

that's it!

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