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Quarks and Beta Decay

In beta-minus decay A neutron changes into a proton.This is because a down quark changes into an up quark.

d   →   u

In beta-plus decay, a proton changes into a neutron.This is because an up quark changes into a down quark.

u   →   d

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Specification: AQA Physics (7407), AS-level, 3.2.1.6 Quarks and antiquarks and 3.2.1.2 Stable and unstable nuclei. Topic: Quarks and Leptons.

Key terms in this lesson

Alpha particle
A helium nucleus, consisting of two protons and two neutrons, emitted from an unstable nucleus in alpha decay.
Resistance
The ratio of the potential difference across a component to the current flowing through it, measured in ohms.

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