What this topic covers
Topic P1: Matter has 2 subtopics:
- P1.1 The particle model
- P1.2 Changes of state
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GCSE OCR Higher Combined Science Physics · Topic 1 of 6
Topic P1: Matter – GCSE OCR Higher Combined Science Physics revision notes
Choose a subtopic. OCR Combined Science Physics matter content. 16 lessons in 2 subtopics.
Revise Topic P1: Matter for GCSE OCR Higher Combined Science Physics, including P1.1 The particle model. 16 lessons across 2 subtopics.
16
Lessons
2
Subtopics
Topic P1: Matter lessons by subtopic
16 lessons, grouped by subtopic.
P1.1 The particle model
- States of Matter and Density
- Calculating Density
- The Structure of the Atom
- Electron Arrangement and Energy Levels
- Atomic Number, Mass Number, and Neutral Atoms
- Isotopes and Ion Formation
- Early Atomic Models
- The Nuclear Model
- Refining the Model: Bohr and Chadwick
P1.2 Changes of state
More in this course
Go back to the full GCSE OCR Higher Combined Science Physics topic list, or practise this topic with past-paper questions.
Frequently asked questions
What is Topic P1: Matter?
OCR Combined Science Physics matter content. 16 lessons in 2 subtopics.
What is the formula for density?
The density formula is ρ = m/V: density = mass ÷ volume, with mass in kilograms (kg), volume in cubic metres (m³) and density in kg/m³. The Calculating Density notes cover this in full.
What is an isotope?
Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. The Isotopes and Ion Formation notes cover this in full.
How do you find mass from density and volume?
Mass is found by rearranging the density equation to m = ρ × V. The Calculating Density notes cover this in full.
What are the units of density?
Density is measured in kg/m³ or g/cm³. The States of Matter and Density notes cover this in full.
What is the atomic number?
The atomic number is the number of protons in the nucleus of an atom, which defines the element. The Atomic Number, Mass Number, and Neutral Atoms notes cover this in full.
What is density?
Density is the mass per unit volume of a material, telling us how much matter is packed into a given space. The Calculating Density notes cover this in full.
What is the relative mass of an electron?
The relative mass of an electron is 1/1840, which is negligible, compared with 1 for a proton or neutron. The The Structure of the Atom notes cover this in full.
Who discovered the electron?
J.J. The Early Atomic Models notes cover this in full.