a) A neutron is a sub-atomic particle with no charge while a proton is sub-atomic particle with a positive charge.
b) A radioactive substance is that with unstable nucleus hence undergoes spontaneous disintegration emitting radiation
c.Long term exposure to low dosages of radiation cause genetic mutations
. Plants and other living organisms may take in radioactive materials released in the water causing pollution.
johnmulu answered the question on February 22, 2017 at 06:06
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Date posted: February 22, 2017. Answers (1)
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Date posted: February 22, 2017. Answers (1)
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Date posted: February 22, 2017. Answers (1)
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The half-life of the isotope is 25 days(Solved)
M grammes of a radioactive isotope decayed to 5 grammes in 100 days
The half-life of the isotope is 25 days
a) What is meant by half-life?
b) Calculate the initial mass M of the radioactive isotope.
Date posted: February 22, 2017. Answers (1)
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Determine the empirical formula of the alkanol (C = 12.0: H = 1.0; O = 16.0)(Solved)
An alkanol has the following composition by mass: Hydrogen 13.5%, oxygen 21.6% and carbon 64.9%
Determine the empirical formula of the alkanol (C = 12.0: H = 1.0; O = 16.0)
Date posted: February 22, 2017. Answers (1)
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Date posted: February 22, 2017. Answers (1)
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State two uses of ethanol other than as an alcoholic drink
Date posted: February 22, 2017. Answers (1)
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Date posted: February 22, 2017. Answers (1)
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Date posted: February 22, 2017. Answers (1)
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Give two uses of the polymer polystyrene
Date posted: February 22, 2017. Answers (1)
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Two organic compounds P and Q decolourise acidified potassium manganate (VII) solution, but only P reacts with sodium metal to give a colourless gas. Which homologous series does compound P belong? Give a reason.
Date posted: February 22, 2017. Answers (1)
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Date posted: February 22, 2017. Answers (1)
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The use of CFCs has been linked to depletion of the ozone layer.
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c) State another environmental problem caused by CFCs
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Some animal and vegetable oils are used to make margarine and soap. Give the reagent and conditions necessary for converting the oils into:
a) Margarine
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Date posted: February 22, 2017. Answers (1)
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(Solved)
Name the process that takes place when:
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Date posted: February 21, 2017. Answers (1)
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b) Hexane is a compound containing carbon and hydrogen. (Solved)
a) What is the name given to a compound that contains carbon and hydrogen only?
b) Hexane is a compound containing carbon and hydrogen.
i) What method is used to obtain hexane from crude oil
ii) State one use of hexane
Date posted: February 21, 2017. Answers (1)
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Explain why the boiling point of ethanol is higher than that of hexane (Relative molecular mass of ethanol is 46 while that of hexane is 86)
Date posted: February 21, 2017. Answers (1)
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Date posted: February 21, 2017. Answers (1)
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Date posted: February 21, 2017. Answers (1)