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

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Question 4

Medium

Define isotopes in terms of subatomic particles.

[1]

Element $Y\text{Y}$ has two isotopes. Their mass numbers are $79$ and $81$ .

The percentage abundance of each isotope is:

$35%35\%$ of $79Y{}^{79}\text{Y}$
$65%65\%$ of $81Y{}^{81}\text{Y}$

Estimate the relative atomic mass of element $Y\text{Y}$ by selecting one of the following ranges:

Less than $79.5$
Between $79.5$ and $80.0$
Between $80.0$ and $80.5$
Greater than $80.5$

[2]

Rutherford's gold foil experiment (alpha particle scattering experiment) led to a new scientific understanding of the nuclear atom, replacing the plum pudding model. Explain how the results of this experiment led to the proposal of the nuclear model.

[2]

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

Question 4

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 4

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