Difference between revisions of "Neutron"
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{| border="1" style="border-collapse:collapse" | {| border="1" style="border-collapse:collapse" | ||
| style="height:20px; width:120px; text-align:center;"|'''[[Subatomic Particle]]''' | | style="height:20px; width:120px; text-align:center;"|'''[[Subatomic Particle]]''' | ||
| + | | style="height:20px; width:120px; text-align:center;"|'''[[Quark]]-composition''' | ||
| style="height:20px; width:120px; text-align:center;"|[[Electrical Charge|'''Charge''']]/[[Elementary Charge|e]] | | style="height:20px; width:120px; text-align:center;"|[[Electrical Charge|'''Charge''']]/[[Elementary Charge|e]] | ||
| style="height:20px; width:120px; text-align:center;"|'''[[Strangeness]]''' | | style="height:20px; width:120px; text-align:center;"|'''[[Strangeness]]''' | ||
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| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| − | [[ | + | [[Neutron]] |
| + | | style="height:20px; width:120px; text-align:center;"|<math>udd</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=0</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
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| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| − | [[ | + | [[Antineutron]] |
| + | | style="height:20px; width:120px; text-align:center;"|<math>\bar{u}\bar{d}\bar{d}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=0</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
Revision as of 17:29, 18 July 2019
Key Stage 4
Meaning
The Neutron is a neutral particle found in the nucleus of an atom.
About Neutrons
- Neutrons are a type of nucleon.
- Neutrons have a relative atomic charge of 0 and a relative atomic mass of 1.
- The number of neutrons in an atom can be found subtracting the Atomic Number from the Relative Atomic Mass.
| Hydrogen | Helium | Lithium | Beryllium |
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 |
 |
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| This atom has an Atomic Number (Z) of 1 and a Relative Atomic Mass (A) of 1.
Number of neutrons = A - Z Number of neutrons = 1 - 1 Number of neutrons = 0 |
This atom has an Atomic Number (Z) of 2 and a Relative Atomic Mass (A) of 4.
Number of neutrons = A - Z Number of neutrons = 4 - 2 Number of neutrons = 2 |
This atom has an Atomic Number (Z) of 3 and a Relative Atomic Mass (A) of 7.
Number of neutrons = A - Z Number of neutrons = 7 - 3 Number of neutrons = 4 |
This atom has an Atomic Number (Z) of 4 and a Relative Atomic Mass (A) of 9.
Number of neutrons = A - Z Number of neutrons = 9 - 4 Number of neutrons = 5 |
Key Stage 5
Meaning
A neutron is a baryon made from 1 up-quark and 2 down-quarks.
About Neutrons
- Neutrons have a charge of zero and a mass of 1.67x10-27kg.
- A neutron is only stable in the nucleus of an atom. However a free neutron has a mean lifeftime of around 15 minutes before it decays via the weak interaction into a proton and an electron.
| Subatomic Particle | Quark-composition | Charge/e | Strangeness | Baryon Number | Lepton Number |
| \(udd\) | \(q=0\) | \(S=0\) | \(b=+1\) | \(l=0\) | |
| \(\bar{u}\bar{d}\bar{d}\) | \(q=0\) | \(S=0\) | \(b=-1\) | \(l=0\) |