Two questions. 1. What makes a "fluorescent" highlighter marker so bright?

I just want to know the answer for the first one but i want to know who else knows this show.
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2. Who has seen/heard a show called.

Doctor Who? (Don't blame me for watching this show)

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