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

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Question 42

Medium

A mass spectrometer analysis of a cosmic dust sample returned from an asteroid reveals the abundance of three stable isotopes of magnesium.

The table below shows the mass numbers and their percentage abundances in this cosmic sample:

$(%)2468.202515.302616.50\begin{array}{c|c} \text{Isotope Mass Number} & \text{Percentage Abundance (\%)} \\ \hline 24 & 68.20 \\ 25 & 15.30 \\ 26 & 16.50 \\ \end{array}$

Calculate the relative atomic mass ( $A_r$ ) of magnesium in this sample.

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

Question 42

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

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

Question 42

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