Hydrocarbons, the carbonyl group, and carbohydrates all have carbon, and they only differ based on the type of carbon-carbon bonds that exist in the molecule.

true
false

The answer to your question is: false

Explanation:

Hydrocarbons are molecules composed by Carbon and Hydrogen and they are classified according to the kind of bonds that they have.

Carbonyl group are molecules composed by Carbon, Hydrogen and Oxygen and are classified according to the position of the oxygen, they can be aldehydes or ketones.

Carbohydrates are more complex molecules composed by Carbon, Hydrogen and Oxygen.

i think   the answer is c hope i'm right

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