Name 5 elements that we don’t know what the state is at room temperature

Fermium, Oganesson, Darmastadium, Astatine, Lutetium, Bohrium, Hassium, Seaborgium...

Explanation:

We don't know about the physical states of all of these elements because of their very very short half lives.

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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