Question

PLEASE HELP THIS IS DUE TODAY

Which of these is NOT a molecule?
KCI, because K is a metal.
H2, because there is only one type of element.
SO2 , because S and O are both in group 6A on the periodic table.
NH3 , because N and H are both nonmetals.

Answer 1

H2

Step-by-step explanation:

A molecule is a combination of 2 or more elements. H2 is just 2 Hydrogen atoms...