Which is the function of the skull

to protect the brain and to support the structure of the face, attachments is muscles

Explanation:

the function of the skull is to protect the soft and the virtual. tissues of the head, particular the brain

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