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2.2 Bonding

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Question 12
F

Hydrogen cyanide, HCN\mathrm{HCN}HCN, is a simple molecule. The carbon atom is bonded to the hydrogen atom and to the nitrogen atom. Every atom in the molecule has a full outer shell.

A dot and cross diagram of HCN\mathrm{HCN}HCN is drawn, showing only the outer shell electrons.

How many shared pairs of electrons and how many non-bonding pairs of electrons does the diagram show?

[1]
A

4 shared pairs and 1 non-bonding pair

B

2 shared pairs and 3 non-bonding pairs

C

4 shared pairs and 2 non-bonding pairs

D

3 shared pairs and 1 non-bonding pair

Markscheme

2.2 Bonding Questions

  1. GCSE
  2. /Chemistry
  3. /2.2 Bonding

64 exam-style questions on OCR GCSE Chemistry 2.2 Bonding, covering 2.2.1 Metals, non-metals and the Periodic Table, 2.2.2 Types of chemical bonding and dot and cross diagrams, 2.2.3 Limitations of bonding models, and 2.2.4 Reactivity, atomic number and the modern Periodic Table. Each one has a worked solution and a mark scheme showing where the marks go.

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