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2.4 Covalent bonding

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Question 8
F

Each oxygen atom has six outer-shell electrons. Oxygen gas contains O2\mathrm{O_2}O2​ molecules.

a.

Draw an outer-shell dot-and-cross diagram of an oxygen molecule. Use dots for one atom's electrons and crosses for the other atom's electrons.

[3]
b.

Explain why a diagram with only one shared pair does not give both oxygen atoms complete outer shells.

[2]
c.

State the type of covalent bond between the atoms and the total number of electrons in that bond.

[2]
Markscheme

2.4 Covalent bonding Questions

  1. GCSE
  2. /Chemistry
  3. /2.4 Covalent bonding

53 exam-style questions on Edexcel GCSE Chemistry 2.4 Covalent bonding, covering 2.4.1 Covalent bonding and simple molecules. Each one has a worked solution and a mark scheme showing where the marks go.

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