6. Which of these is not an example of a molecule?

A. CH4

B. C6H1206

C. Mg

D. H20 1


7. Two or more elements chemically combined:

A. an atom

B. a mixture
C. a compound
D. a pure substance

8. tells us the number of atoms in each molecule.
A. Coefficient
B. Subscript
C. Element
D. All the above

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