Periodic Table

I am the heaviest noble gas.

My symbol is H.

How many electrons does Aluminum - 27 have?

My symbol is Au.

I am the lightest noble gas.

This group is made up of unreactive nonmetals.

I have 47 protons.

I am the lightest element on the periodic table.

This group is made up of very reactive nonmetals.

My average atomic mass is 19.00.

I am an actinide.

My symbol is Sn.

I am a halogen.

I have 12 protons.

I am the only liquid metal on the periodic table.

I contain 7 protons.

I am the lightest metal on the periodic table.

How many neutrons does manganese - 55?

I am the only gas left of the zigzag line on the periodic table.

I have 20 neutrons.