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

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Question 12

A laboratory analyses a sample of element X. The results for the two types of atom of X are shown in the table.

Type of atomMass numberPercentage abundance
X-242480
X-262620

When X reacts, each atom of X forms an ion. A neutral atom of X contains 12 electrons. The ion formed has the same electronic structure as a neutral atom that contains 10 electrons.

a.

Calculate the relative atomic mass of element X. Give your answer to one decimal place.

[2]
b.

Explain how an atom of X forms the ion. Give the overall charge of the ion.

[3]
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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

93 exam-style questions on AQA GCSE Chemistry 1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, covering 1.1.1a Atoms, elements and compounds, 1.1.1b Half equations and ionic equations, 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.

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