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

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Question 3
Easy

An element, XXX, has two isotopes.

The table below shows the mass numbers and percentage abundances of the isotopes.

Mass numberPercentage abundance (%)
6365
6535

Calculate the relative atomic mass (ArA_rAr​) of element XXX.

Give your answer to 1 decimal place.

[2]

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