Flashcards
P4 - Atomic Structure/radioactive decay
Cards in this deck (7)
- 1Atomic StructureCharge
Proton - 1+
Neutron - 0
Electron - 1-
Mass
Proton - 1
Neutron - 1
Electron - 1/2000
location
proton - in the nucleus
neutron - in the nucleus
electrons - in the shells - 2Radioactive DecayAn atom’s nucleus can only be stable if it has a certain amount of neutrons for the amount of protons it has.
- 3Radioactive Decay 2An unstable nucleus can decay by emitting an alpha particle, a beta particle, a gamma ray or in some cases a single neutron.
- 4Alpha ParticleAlpha decay causes the mass number of the nucleus to decrease by four and the atomic number of the nucleus to decrease by two. Helium nucleus charge of 2+ least penetrating damage DNA.
- 5—lithium atom
- 6Beta ParticleIf the nucleus has too many neutrons, a neutron will turn into a proton and emit a fast-moving electron. This electron is called a beta ( β ) particle – this process is known as beta radiation. Relative mass of 0.
- 7Gamma ParticleHigh energy particles will emit energy as they drop to lower energy levels. Since energy levels in the nucleus are much higher than those in the gas, the nucleus will cool down by emitting a more energetic electromagnetic wave called a gamma ray. Most penetrating.
Information
- Description
- Year 9 Physics Flashcards on P4 - Atomic Structure/radioactive decay, created by Toby Crawford on 10/01/2019.
- Created by
- Toby Crawford
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- 8
- History
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- Created by Cam Hodges · Jan 9, 2019
- Copied by Toby Crawford · Jan 10, 2019
- Rating