Noble gases properties- fill in the blank

The density of the noble gases ____________________ down the grou p

the melting point of the noble gases ____________________ down the grou p

the boiling point of the noble gases ____________________ down the grou p

the noble gases are inert , which means they don't want to react .

All of the noble gases have ____________________ outer shell s

Neon has ____________________ electrons in tota l

Argon has ____________________ valance electron s

Helium has ____________________ valance electron s

The noble gases are ____________________ , which means that they are found by themselves .

____________________ is used in balloons because it is less dense than air .