A sample of a gas is placed inside a cylinder that is a fixed size. The cylinder is heated as additional gas
is added to it. What will most likely happen to the pressure of the gas inside the cylinder?
It will decrease.
It will increase.
It will not change.

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