noble gases

how many total noble gases are there in the periodic table and in which group?

• 17 gases in group 8

• 18 gases in group 7

• 7 gases in group 8

• 8 gases in group 7

click all the uses of helium that apply:

• balloons to check weather

• useful in cancer therapy

• germanium and silicon crystal for bulb, transistors

• deep sea diving air tanks

which element is this?

• helium

• radon

• krypton

• xenon

select all the properties of noble gases that apply

• non reactive

• low ionization energy

• high boiling point

• can never conduct electricity

noble gases conduct electricity and fluorescence at ____

___ is the most reactive noble gas

noble gases are unreactive but not inert

• true

• false