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Metals, non-metals and compoundsGroup 0 elements

In this OCR GCSE Chemistry study guide, we'll go through the group 0 elements, the noble gases, are all unreactive non-metal gases. We'll explain how they show trends in their physical properties and how their uses depend on their inertness, low density and non-flammability.

Part of Chemistry (Single Science)Chemical patterns

Group 0 elements

contains placed in the vertical column on the far right of the . The elements in group 0 are called the . They exist as single .

Periodic table with the Group 0 Noble Gases coloured in red.
Figure caption,
Group 0 is on the far right-hand side of the periodic table

Trends in physical properties

Melting and boiling point

The forces of attraction between single atoms is very weak so the noble gases all have low and . Melting and boiling points increase going down the group, as the atoms get larger.

The group 0 elements are in the gas state at room temperature and pressure. This is because their boiling points are below room temperature.

Bar chart of the boiling points of elements in Group 0
Figure caption,
The boiling points of group 0 elements

Question

Radon is situated below xenon in group 0. Predict the likely boiling point of radon.

Density

The of a substance is its per unit . For example, a small piece of a substance with a high mass has a high density.

The in gases are widely spaced, so the noble gases have low densities. The density increases going down the group because the atoms have greater mass but the gas takes up the same volume.