Properties and formulae

Match it! Select the correct answer from the pull down...Good luck!

The correct formula for sulfur trioxide is...

Which of the following elements is not diatomic?

Iron(II) nitride has the formula:

MgO(aq)

Which halogen does not have the valency of one?

Which of the following would conduct electricity when solid?

Which substance has the correct formula?

Substance X conducts electricity as a liquid. Its bonding is