How many valence electrons does chlorine have ?

Chlorine has seven valence electrons.

Explanation: Chlorine has the atomic number of 17. The atomic number is an number of protons that present inside of the nucleus of an atom. All of the the atoms of an element have all of the same atomic number. Also, in every stable atom the number of electrons is always equal to the number of protons that it has.

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

i think that the answer is c