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Atomic structure

Atomic structure

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Question 12
a.

The table below shows the relative mass and relative charge of protons, neutrons, and electrons. Some values are missing.

Subatomic particleRelative massRelative charge
Proton[ A ][ B ]
Neutron1[ C ]
Electron[ D ]-1

State the values of [ A ], [ B ], [ C ], and [ D ].

[4]
b.

The chemical symbol for an atom of one isotope of lithium is 37Li{}_{3}^{7}\text{Li}37​Li.

(i) State the number of protons, neutrons, and electrons present in one neutral atom of this isotope.

[2]
c.

What is meant by the term isotopes?

[2]
d.

Copper has two naturally-occurring isotopes with mass numbers 63 and 65. A sample of copper contained the two isotopes in the following proportions:

  • copper-63 = 69.2%
  • copper-65 = 30.8%

Use this information to calculate the relative atomic mass of copper. Give your answer to two decimal places.

[3]
Markscheme

Atomic structure Questions

  1. IGCSE
  2. /Chemistry
  3. /Atomic structure

41 exam-style questions on Edexcel IGCSE Chemistry Atomic structure. Each one has a worked solution and a mark scheme showing where the marks go.

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