Science help naming compounds and writing formulas

1. The elements most likely to form more than one type of ion are the (1 point)
transition metals.
alkali metals.
halogens.
alkaline earth metals.
2. The name iron(II) indicates that a compound contains (1 point)
iron ions with an 11+ charge.
iron ions with a 2+ charge.
iron ions with a negative charge.
two types of iron ions.
3. Alkali metals, alkaline earth metals, and aluminum all form ions with positive charges equal to (1 point)
the atomic number.
the group number.
a polyatomic ion.
an ionic bond.
4. In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains (1 point)
two carbon atoms.
two oxygen atoms.
a polyatomic ion.
an ionic bond.

1. transition metals.

2. iron ions with a 2+ charge.

3. the group number.

4. two oxygen atoms.