Answer
a. Compound and molecule.
b. Compound and molecule.
c. Compound.
d. Compound.
e. Element and molecule.
f. Compound.
Work Step by Step
A compound is made of two or more different types of atoms, like $CO_2$
An element is made of only one type of atom, like $F_2$
A molecule is made of covalent bonds between nonmetals. like $CO_2$
