Scientists approximate that there are 20 billion stars like our sun in the Milky Way. Why does the sun appear to be brighter than any other star in the Milky Way? A. The sun is older than all of the other stars in the Milky Way.
B. The sun is closer to the Earth than any other star in the Milky Way.
C. The sun is hotter than any other star in the Milky Way.
D. The sun has more energy than any other star in the Milky Way.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

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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~ trueboss72