P2 6.3 Nuclear Reactions
- Created by: kayleigh_p
- Created on: 09-04-15 20:00
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- Nuclear Reactions
- In an atom, number of protons = number of electrons
- Atoms have no overall charge
- If an atom loses or gains electrons it becomes charged
- Becomes an ion
- All atoms of an element have the same number of protons
- Atoms of an element which have different numbers of neutrons are called isotopes
- Number of protons in an atom is its atomic number
- No. of neutrons + No. of protons = mass number
- An alpha particle has two protons and two neutrons
- Relative mass is 4 and relative charge is +2
- A beta particle is a high-speed electron from the nucleus
- Relative mass is 0 and relative charge is -1
- When a nucleus emits gamma radiation there is no change in the atomic number or the mass number
- Gamma radiation has no charge and no mass
- In an atom, number of protons = number of electrons
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