Which of the following elements is not diatomic?

The correct formula for sulfur trioxide is...

Which of the following would conduct electricity when solid?

How many delocalised electrons will an aluminium atom have?

Substance X conducts electricity as a liquid. Its bonding is

Substance Y never conducts electricity and has a low melting and boiling point.

MgO(aq)

Which substance has the correct formula?

Iron(II) nitride has the formula:

Which halogen does not have the valency of one?

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