9: Group 0 Elements

What are the Group 0 elements also known as?

noble gases

Name the noble gases.

* Helium
* Neon
* Argon
* Krypton
* Xenon
* Radon

Describe the pattern in boiling points for the Group 0 elements.

* They have low boiling points

Name some of the noble gases’ physical properties.

* Low melting and boiling points
* Colourless gases at room temperature

Why are noble gases used in advertising signs?

* Glow brightly when high voltage electricity passes through them
* Letters contain neon gas

Why is helium used in balloons?

* Helium has a lower density than air

What can argon by used for, and why?

* Argon is used in the gap between the two panes of glass in double glazing
* It is a better insulator than air

unreactive

Elements that take part in few chemical reactions.

What happens to the reactivity of the noble gases from top to bottom?

* They become slightly more reactive

State some facts about the reactivity of the noble gases.

* As far as we know, helium and neon never take part in chemical reactions
* By 2000, a group of Finnish scientists made the compound argon fluorohydride, ArHF, but only existed at temperature below -265 degrees
* Xenon forms compounds with fluorine and oxygen

Where do noble gases come from?

* They exist in atmosphere
* Mixed with other gases

How do companies separate the noble gases from the atmosphere?

* Fractional distillation

Where else can helium be found, apart from the atmosphere?

* Mixed with natural gas under the ground
* Under the sea
* Expensive to separate it from the mixture