A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

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Question 11
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The table below shows information about three isotopes of silicon.

Mass numberPercentage abundance (%)2892.22294.69303.09\begin{array}{c|c} \text{Mass number} & \text{Percentage abundance (\%)} \\ \hline 28 & 92.22 \\ 29 & 4.69 \\ 30 & 3.09 \\ \end{array}Mass number282930​Percentage abundance (%)92.224.693.09​​

Calculate the relative atomic mass (ArA_rAr​) of silicon.

Give your answer to 3 significant figures.

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A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes Questions

  1. GCSE
  2. /Chemistry
  3. /A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes