3.01 x 1023 molecules H20

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

16

explanation:

the marks go by 4s

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)