P7 - Radioactivity Flashcards

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  • Created by: sanjbvb
  • Created on: 09-12-17 18:20
Radioactive substance
Substance that contains unstable nuclei
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Plum Pudding Model
Large positively charged matter with negatively charged electrons spread about
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Alpha particle
A charged 2+ particle made of 2 protons and 2 neutrons, mass number of 4)
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Alpha decay
When an alpha particle is released from nucleus, atomic number ↓2 and mass number ↓4
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Beta particle
A high-speed electron which is ejected from the nucleus when a neutron changes into a proton
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Beta decay
When a beta particle is released from nucleus, atomic number ↑1 and mass number is unchanged
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Gamma radiation
EM radiation from nucleus of atom, uncharged and has no mass
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Ionisation
When radiation from a radioactive substance knocks electrons out of atoms, making them charged
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Other cards in this set

Card 2

Front

Large positively charged matter with negatively charged electrons spread about

Back

Plum Pudding Model

Card 3

Front

A charged 2+ particle made of 2 protons and 2 neutrons, mass number of 4)

Back

Preview of the back of card 3

Card 4

Front

When an alpha particle is released from nucleus, atomic number ↓2 and mass number ↓4

Back

Preview of the back of card 4

Card 5

Front

A high-speed electron which is ejected from the nucleus when a neutron changes into a proton

Back

Preview of the back of card 5
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