an unknown substance were tasted. the result are l. it conducts electricity when dissolved in water ll. it has high boiling point lll. it has melting point what kind of compound is the unknown substance​

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.