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Oxygen

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Key Stage 2

Meaning

Oxygen is a gas in the air.

Key Stage 3

A 2 dimensional representation of a Oxygen atom with 8 protons and 8 neutrons in the nucleus and 8 electrons orbiting the nucleus.

Meaning

Oxygen is a Group 6 non-metal element, on the Periodic Table, with an atomic number of 8.

About Oxygen

Oxygen makes up 21% of the air.
Oxygen has the chemical symbol O.

Molecular Structure

The chemical formula for a Oxygen molecule is O2.

Atomic Structure

Oxygen has 8 protons and 8 neutrons in its nucleus giving it an atomic number of 8 and a atomic mass of 16.
Oxygen is in Period 2 of the Periodic Table because it has 2 electron shells.

Properties

Oxygen is a gas at room temperature.

Key Stage 4

A 2 dimensional representation of the Bohr Model of a Oxygen-16 isotope with 8 protons and 8 neutrons in the nucleus and 2 electrons in the first shell and 6 in the outer shell.

Meaning

Oxygen is a Group 6 non-metal element, on the Periodic Table, with 8 protons in the nucleus.

About Oxygen

Oxygen makes up 21% of the air.
Oxygen has the chemical symbol O.

Molecular Structure

The chemical formula for an Oxygen molecule is O2.
Oxygen forms a covalent bond with another Oxygen atom to produce a simple covalent molecule.

Atomic Structure

The most common stable isotope of Oxygen has 8 neutrons in its nucleus giving it an atomic mass of 16.
Oxygen is in Period 2 of the Periodic Table because it has 2 electron shells.
Oxygen has 6 electrons in its outer shell and needs 2 more to get a full outer shell so it can form 2 bonds with other atoms.

Properties

Oxygen is gas at standard temperature and pressure.

Testing for Oxygen

  1. Collect the gas in a test tube.
  2. Place a glowing splint over the mouth of the test tube.
  3. If the splint relights then the gas is Oxygen.

References

AQA

Oxygen, page 287, GCSE Physics; Student Book, Collins, AQA
Oxygen, pages 107, 184-5, 213, 292-5, GCSE Chemistry; Student Book, Collins, AQA
Oxygen, pages 184, 194-195, 197, GCSE Chemistry; Third Edition, Oxford University Press, AQA
Oxygen, pages 52, 61, 124, 282, 288-289, GCSE Biology; Third Edition, Oxford University Press, AQA

OCR

Oxygen, pages 42, 49, 191, 236, 259, Gateway GCSE Biology, Oxford, OCR