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- 1balance of charges in an atomWhen an atom has one or more missing electrons it is left with a positive charge, and when an atom has at least one extra electron it has a negative charge. Having a positive or a negative charge makes an atom an ion. Atoms only gain and lose protons and neutrons through fusion, fission, and radioactive decay.
- 2what size is a helium atom?1x10-5m
- 3What is the charge on the helium atom in the figure above ?Neutral 0
"no" charge - 4Give the reason why all the atoms have a total charge of 0Number of electrons = number of protons
- 5What happens to the structure of an atom to charge it into an ion?Looses/ gains electrons
- 6AlphaHas the shortest range in air
- 7Gammais very weakly ionising
- 8BetaWill pass through paper but is stopped by thin metal
- 9what is the half life radioactive isotope if the half-life = 2 hours ?Explanation:
Count rate halves in that time - 10When a radioactive isotope decays it can produces beta particles What is a beta particle?A high-speed electron
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- Fichas sobre Sin título, creado por Sophie Whittock el 21/01/2019.
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- Sophie Whittock
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