Question

how many covalent bonds does an atom need in order to fill its valence shell, using the periodic table?

Answer 1

the covalency of atoms tells about the covalent bond. And by following the octet rule they form covalent bonds.

Answer 2

it depends on how many electrons the atom already has.

Most atoms need a total of 8 valence e, so if an atom had 6 valence e, it needs 2 covalent bonds, if it had 5 valence e, it needs 3 covalent bonds, If the atom had 4 valence e, it needs 4 covalent bonds, etc.

Answer 3

Thank you both! ^^

Answer 4

no problem !