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18 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is the Bohr Model of atoms? |
A simple way of describing the structure of atoms. It has a nucleus in the centre, containing the protons and neutrons, and rings of electrons surrounding it. |
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Are electrons elementary or composite? |
Elementary |
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Are protons elementary or composite? |
Composite |
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Are neutrons elementary or composite? |
Composite |
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What does it mean to be a 'composite particle'? |
A particle made up of smaller units known as quarks. |
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What are the six types of quark? |
Up Down Charmed StrangeCharmedTopBottom StrangeCharmedTopBottom Top Bottom |
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What is the charge of an up quark? |
+2/3 |
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What is the charge of a down quark? |
-1/3 |
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What comprises a proton? |
2 up quarks and 1 down quark |
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What comprises a neutron? |
1 up quark and 2 down quarks |
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What is a Thermion? |
A particle with integer spin. |
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What spin do protons, neutrons, and electrons have? |
Spin half |
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What does 'spin half' mean? |
The particle has to be rotated through 720 degrees before it is the same orientation as it started. |
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What letters are used to represent orbitals? |
1 - K 2 - L 3 - M |
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What letters are used to represent the subshells within orbitals, and their meaning? |
P - principal S - sharpP - principal D - diffuseF - fundamental sharpP - principal D - diffuseF - fundamental D - diffuse F - fundamental |
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What is excitation? |
A process by which an electron gains sufficient energy to exist in a higher energy shell. This only occurs when there is space in the higher energy shell. |
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What is de-excitation? |
When an excited electron drops back to its former position due to its energy source stopping. As a result a photon of energy is released. This photon has an energy equivalent to the energy difference of the two shells the electron has moved between. |
Photon! |
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What factor affect ionisation? |
- Size of nuclear charge - Size of atoms - Shielding effect |
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