Grade 10 Physical Sciences · Matter and Materials

Draw Lewis diagrams

Draw Lewis dot diagrams showing valence electrons, shared pairs and lone pairs (water has two bonding pairs and two lone pairs).

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23) Lewis Diagrams Grade 10Kevinmathscience

Chemical Bonding: Covalent Bonding Lewis Dot DiagramsMiss Martins Maths and Science

Chemical Bonding: Ionic Bonding Lewis Dot DiagramsMiss Martins Maths and Science

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Question WE3 · Siyavula Grade 11 Physical Sciences, 3.1 Chemical bonds, Worked example 3 · 2 marks

WE3 Represent water (

H_{2} O

) using a Lewis diagram(2)

Work it out on paper first. Then mark yourself with the official memo, one tick at a time.

More past paper questions: draw lewis diagrams

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3. Question 2.2.1 · November 2025 · Paper 2 · Provincial · 2 marks
Consider the following substances (A–D) in the table below:
2.2 Draw the Lewis structures for the following molecules.
2.2.1 HOCl(2)
Show the memo (1 tick)Memo
1. ✓
  Lewis structure of HOClH shares one pair with O; O shares one pair with Cl. O has two lone pairs and Cl has three lone pairs.
  H : O : Cl (as in the memo drawing).
  2 marks · Draw Lewis diagrams
4. Question 2.3.2 · November 2024 · Paper 2 · Provincial · 2 marks
Consider the following compounds.
2.3 Draw the Lewis structure of the following compounds:
2.3.2 $H_{2}$ S(2)
Show the memo (1 tick)Memo
1. ✓
  Lewis structure of $H_{2}$ SH : S : H with one shared pair between S and each H, and two lone pairs on S (see the drawing).
  2 marks · Draw Lewis diagrams
5. Question 4.2.4 · November 2024 · Paper 2 · Provincial · 4 marks
4.2 Aluminium is a metal and a good conductor of electricity.

Answer the questions that follow.
4.2.4 Use Lewis diagrams to show how the product is formed.(4)
Show the memo (4 ticks)Memo
1. ✓
  Lewis diagram of AℓAℓ with three valence electrons (three single dots).
  1 mark · Draw Lewis diagrams
2. ✓
  Lewis diagram of NN with five valence electrons (one pair and three single dots).
  1 mark · Draw Lewis diagrams
3. ✓
  Aluminium ion $A ℓ^{3 +}$ (no dots)
  1 mark · Draw Lewis diagrams
4. ✓
  Nitride ion $[N]^{3 -}$ in square brackets with eight electrons (four pairs)
  1 mark · Draw Lewis diagrams
6. Question 6.4.2 · November 2023 · Paper 2 · Provincial · 2 marks
In the reaction below, $3$ g of $Na_{2} CO_{3}$ were reacted with hydrochloric acid solution and an effervescence is observed.

$Na_{2} CO_{3} + HC ℓ \to NaC ℓ + CO_{2} + H_{2} O$
6.4 Draw Lewis dot diagrams for:
6.4.2 $H_{2} O$ (2)
Show the memo (1 tick)Memo
1. ✓
  Lewis diagram of H2OO in the centre bonded to two H atoms by single bonds (one shared pair each), with two lone pairs on O.
  2 marks · Draw Lewis diagrams

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