HELP ASAP Matter Around Us: Mastery Test

Select the correct answer.
What is a substance?
A.
a uniform mixture that can't be separated
B.
a mixture that can be separated
C.
a single component that can't be separated
D.
a single component that can be separated

h let me think

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!

if you need further assistance, let me know: )

~ trueboss72