Skip to content

Course home

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

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

EasyMedium
1234567891011121314151617181920212223242526272829303132333435
Question 3
43%
a.

Define isotopes in terms of subatomic particles.

[1]
b.

Element Y\text{Y}Y has two isotopes. Their mass numbers are 797979 and 818181.

The percentage abundance of each isotope is:

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

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

  • Less than 79.579.579.5
  • Between 79.579.579.5 and 80.080.080.0
  • Between 80.080.080.0 and 80.580.580.5
  • Greater than 80.580.580.5
[2]
c.

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]
Markscheme

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

  1. GCSE
  2. /Chemistry
  3. /1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

41 exam-style questions on AQA GCSE Chemistry 1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, covering 1.1.1 Atoms, elements and compounds, 1.1.2 Mixtures, 1.1.3 The development of the model of the atom (common content with physics), 1.1.4 Relative electrical charges of subatomic particles, 1.1.5 Size and mass of atoms, 1.1.6 Relative atomic mass, and 1.1.7 Electronic structure. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank