What is the main reason scientists perform experiments
a) to summarize experimental information
b) to collect scientific data
c) to find answers to their questions
d) to play with equipment in the lab

its defiantly not d and i don't thinks its a i would either say b or c.  i think it is b so they can have data to see if there question is correct

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