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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.

1 Answer

6 votes

Answer:

H2

Step-by-step explanation:

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

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