Avogadro Constant

Contents

Key Stage 4

Meaning

The Avogadro Constant is the number of atoms in 12g of Carbon. 6.02x10²³ atoms per mole.

About the Avogadro Constant

The Avogadro Constant is used to state the number of atoms or molecules in a mole of a substance.

The Avogadro Constant is normally written in standard form.

6.02x10²³ = 602,000,000,000,000,000,000,000 correct to 3 Significant Figures.

1 mole of an element contains 6.02x10²³ atoms of that element.

1 mole of a molecule contains 6.02x10²³ molecules.

Extra Information

References

AQA

Avogadro constant, page 106, GCSE Combined Science Trilogy; Chemistry, CGP, AQA

Avogadro constant, page 112, GCSE Chemistry, CGP, AQA

Avogadro constant, page 42, GCSE Chemistry; The Revision Guide, CGP, AQA

Avogadro constant, page 65, GCSE Chemistry, Hodder, AQA

Avogadro constant, pages 178-9, GCSE Combined Science Trilogy 1, Hodder, AQA

Avogadro constant, pages 62-63, GCSE Chemistry; Third Edition, Oxford University Press, AQA

Edexcel

Avogadro constant, page 220, GCSE Combined Science, Pearson Edexcel

Avogadro constant, page 76, GCSE Chemistry, Pearson, Edexcel

Avogadro’s constant, page 28, GCSE Chemistry; The Revision Guide, CGP, Edexcel

Avogadro’s constant, page 91, GCSE Combined Science; The Revision Guide, CGP, Edexcel

Avogadro’s constant, pages 85, 86, GCSE Chemistry, CGP, Edexcel

OCR

Avogadro constant, page 97, Gateway GCSE Chemistry, Oxford, OCR

Avogadro’s constant, page 38, GCSE Chemistry; The Revision Guide, CGP, OCR Gateway

Key Stage 5

Meaning

The Avogadro constant is the number of atoms in 12 grams of carbon-12, approximately 6.02 x 10^23 atoms per mole.

About the Avogadro Constant

• The Avogadro constant is a fundamental constant in chemistry and physics.
• The Avogadro constant is used to calculate the number of particles in a given amount of substance.
• One mole of any substance contains Avogadro's number of particles.