GradeGen

How each exam board covers it

AQA GCSE Chemistry · 8462

Specification 4.1.1.1 · Paper 1, Paper 2

The smallest part of an element that can exist while remaining that element.
Every substance is made of atoms. This applies to solids, liquids and gases: the materials may look and behave very differently, but they are all built from atoms.
Revise: Atoms, Elements and the Periodic Table
The smallest particle of an element that can take part in chemical reactions, consisting of a nucleus surrounded by electrons.
Revise: Atomic Structure and the Periodic Table

AQA Chemistry past papers

Edexcel GCSE Chemistry · 1CH0

Specification 1.2, 1.5, 1.8, 1.30, 9.35C · Paper 1, Paper 2

A particle of matter with a central nucleus surrounded by electrons.
An atom is made of three kinds of smaller, or subatomic, particle: protons, neutrons and electrons. They are not spread evenly throughout it. At the centre is the nucleus, which contains the protons and neutrons.
Revise: Structure of an Atom
The smallest particle of an element that can retain the chemical properties of that element.
Revise: Nucleus Size
A tiny particle with a central nucleus containing protons and neutrons, surrounded by electrons.
Revise: Atoms and Protons

3 more notes

A very small particle that is the smallest part of an element that remains recognisable as that element.
Revise: Mathematical Applications
The smallest particle of an element that can exist while retaining the properties of that element.
Revise: Size of Atoms and Molecules
The smallest particle of an element that retains the chemical identity of that element.
Revise: Nanoparticle Size

Edexcel Chemistry past papers

OCR GCSE Chemistry A · J248

Specification CM1.2i, CM1.2ii, C1.2b, C1.2e, CM2.2i, CM2.3ii · Paper 1 (Foundation), Paper 3 (Higher)

The smallest component of an element that retains the chemical identity of that element.
A gold atom is the smallest component that still has gold's chemical identity. Breaking the atom into its subatomic particles would no longer leave a smaller piece of gold.
Revise: Atomic Scale Relations
The smallest part of an element that retains that element’s chemical identity.
Revise: Scale Estimation
The smallest component of an element that retains the properties of that element.
Revise: Nuclear Atom Structure

3 more notes

Revise: Subatomic Calculations
A fundamental particle of an element that retains the chemical identity of that element.
Revise: Scale Estimation
The smallest particle of an element that retains the chemical identity of that element.
Revise: Atomic Scale Relations

OCR Chemistry A past papers

OCR GCSE Chemistry B · J258

Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

The smallest unit of a chemical element.
A chemical formula uses these symbols to describe a substance. It tells you which elements are present and how many atoms of each element occur in a molecule. A formula is not an abbreviation that can be written in several different ways: changing a symbol, its capitalisation or a subscript can change the substance represented.
Revise: Chemical formulae
The smallest particle of an element that retains that element’s chemical properties, consisting of a nucleus surrounded by electrons.
Revise: Structure of the atom
Revise: Typical size of atoms

OCR Chemistry B past papers

Exam tips

1
For a neutral atom, use the atomic number as both the number of protons and the number of electrons.
2
When writing an electronic structure, check that its numbers add up to the atom's atomic number. For the first 20 elements, fill the shells in the pattern 2,8,8,2.
3
Do not call a substance a compound merely because it contains several atoms. A compound must contain atoms of two or more different elements chemically bonded together.

How each exam board covers it

AQA GCSE Chemistry · 8462

Specification 4.1.1.1 · Paper 1, Paper 2

The smallest part of an element that can exist while remaining that element.
Every substance is made of atoms. This applies to solids, liquids and gases: the materials may look and behave very differently, but they are all built from atoms.
Revise: Atoms, Elements and the Periodic Table
The smallest particle of an element that can take part in chemical reactions, consisting of a nucleus surrounded by electrons.
Revise: Atomic Structure and the Periodic Table

AQA Chemistry past papers

Edexcel GCSE Chemistry · 1CH0

Specification 1.2, 1.5, 1.8, 1.30, 9.35C · Paper 1, Paper 2

A particle of matter with a central nucleus surrounded by electrons.
An atom is made of three kinds of smaller, or subatomic, particle: protons, neutrons and electrons. They are not spread evenly throughout it. At the centre is the nucleus, which contains the protons and neutrons.
Revise: Structure of an Atom
The smallest particle of an element that can retain the chemical properties of that element.
Revise: Nucleus Size
A tiny particle with a central nucleus containing protons and neutrons, surrounded by electrons.
Revise: Atoms and Protons

3 more notes

A very small particle that is the smallest part of an element that remains recognisable as that element.
Revise: Mathematical Applications
The smallest particle of an element that can exist while retaining the properties of that element.
Revise: Size of Atoms and Molecules
The smallest particle of an element that retains the chemical identity of that element.
Revise: Nanoparticle Size

Edexcel Chemistry past papers

OCR GCSE Chemistry A · J248

Specification CM1.2i, CM1.2ii, C1.2b, C1.2e, CM2.2i, CM2.3ii · Paper 1 (Foundation), Paper 3 (Higher)

The smallest component of an element that retains the chemical identity of that element.
A gold atom is the smallest component that still has gold's chemical identity. Breaking the atom into its subatomic particles would no longer leave a smaller piece of gold.
Revise: Atomic Scale Relations
The smallest part of an element that retains that element’s chemical identity.
Revise: Scale Estimation
The smallest component of an element that retains the properties of that element.
Revise: Nuclear Atom Structure

3 more notes

Revise: Subatomic Calculations
A fundamental particle of an element that retains the chemical identity of that element.
Revise: Scale Estimation
The smallest particle of an element that retains the chemical identity of that element.
Revise: Atomic Scale Relations

OCR Chemistry A past papers

OCR GCSE Chemistry B · J258

Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

The smallest unit of a chemical element.
A chemical formula uses these symbols to describe a substance. It tells you which elements are present and how many atoms of each element occur in a molecule. A formula is not an abbreviation that can be written in several different ways: changing a symbol, its capitalisation or a subscript can change the substance represented.
Revise: Chemical formulae
The smallest particle of an element that retains that element’s chemical properties, consisting of a nucleus surrounded by electrons.
Revise: Structure of the atom
Revise: Typical size of atoms

OCR Chemistry B past papers

Exam tips

1
For a neutral atom, use the atomic number as both the number of protons and the number of electrons.
2
When writing an electronic structure, check that its numbers add up to the atom's atomic number. For the first 20 elements, fill the shells in the pattern 2,8,8,2.
3
Do not call a substance a compound merely because it contains several atoms. A compound must contain atoms of two or more different elements chemically bonded together.

Atom

Definition

How each exam board covers it

AQA GCSE Chemistry · 8462

Edexcel GCSE Chemistry · 1CH0

OCR GCSE Chemistry A · J248

OCR GCSE Chemistry B · J258

Exam tips

Revise Chemistry with GradeGen

Atom

Definition

How each exam board covers it

AQA GCSE Chemistry · 8462

Edexcel GCSE Chemistry · 1CH0

OCR GCSE Chemistry A · J248

OCR GCSE Chemistry B · J258

Exam tips

Revise Chemistry with GradeGen

Definition

How each exam board covers it

AQA GCSE Chemistry · 8462

Edexcel GCSE Chemistry · 1CH0

OCR GCSE Chemistry A · J248

OCR GCSE Chemistry B · J258

Exam tips

Related key terms

Revise Chemistry with GradeGen

Definition

How each exam board covers it

AQA GCSE Chemistry · 8462

Edexcel GCSE Chemistry · 1CH0

OCR GCSE Chemistry A · J248

OCR GCSE Chemistry B · J258

Exam tips

Related key terms

Revise Chemistry with GradeGen