The nuclear atom questions

Assignment: Questions on Topic 2: The nuclear atom

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Working sequentially from left to right identify all the missing components in each row to complete the following table.

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Two isotopes used in medicine are 125I and 131I. The atomic number of iodine is 53.

i.  State how they would differ in:

(a) the number of neutrons contained in the nucleus of each isotope.

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(b) their physical properties

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(c) their chemical properties

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ii.  Suggest why people living near the nuclear power plant in Fukushima, which was damaged in the earthquake that hit Japan in March 2011, were given iodine tablets.

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A naturally occurring sample of chromium contains the following relative amounts of four different isotopes.

Determine the relative atomic mass of chromium to two decimal places.

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The relative atomic mass of bromine is 79.91. Determine the relative percentage abundance of its two isotopes 79Br and 81Br to two decimal places.

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