Physics GCSE Paper 2 Cheat Sheet

A Education › Physics cheat sheet in English by Anais_Pe

This is a chest sheet I made for revision for my GCSEphysics paper 2. My exam board is OCR Gateway :)

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PRs

P6.1 - Radioactive Emissions, Atoms and isotopes

The nuclei of atoms of atoms contain protons and neutrons. (The table shows the masses and charges of each subatomic particle.) An element is defined by how many rooms it contains. If there are more or less electrons than protons, then it is an ion. If there more or less neutrons than the relative atomic mass number indicates, then it is an isotope of that element. Isotopes have different nucleus mass because neutrons have a relative atomic mass of 1.

Key words glossary
subatomic particle - protons, neutrons and electrons. Together, they make up atoms.
ion - charged particles.
isotope - atom with a different number of neutrons but the same amount of protons. For example, carbon-12 has 12 subatomic particles in the nucleus.

Fig. 1

Subatomic particle	Relative Mass	Relative Charge
protons	1.0	+1
neutrons	1.0	0
electron	0.0005 (or 0)	-1

Fig. 2

Radiation	Type	Symbol	What is it?	Equation Symbol
alpha	particle	α	Helium atom nucleus
beta	particle	β	Fast-moving electron
gamma	EM wave	γ	EM wave type	none
neutron	particle	n	Particle from the nucleus

Calculating number of subatomic particles

Protons	Electrons	Neutrons
Atomic number	Relative atomic number	Relative atomic mass - Atomic number

P6.1.1 - Radioactive Emissions, Alpha, Beta, Gamma

Some atoms have unstable nuclei. This causes them to emit radiation. They are then radioactive. (See Fig.2)

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