GCSE SCIENCE / BUILT AROUND YOUR NEXT MARK

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3 sciences · 30 minutes each · One week · Free to start

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CHEMISTRY / IONIC BONDINGWorked example · 3 marks

Explain why sodium chloride conducts electricity when molten.

“It contains charged ions.”

1/3

A correct start.
Two ideas still to explain.

Illustrative feedback, not a live mark

GCSE SCIENCE.
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Chemistry

Describe and explain the differences in properties between diamond and sodium chloride. [6 marks]

Diamond is hard and sodium chloride has a high melting point. They are both solids.
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Let’s fix ionic bonding

Chemistry

Why this topic?

Your recent answers show that electron transfer is one of the best places to recover marks.

Choose how to start

Why did I lose marks on magnesium ions?
You said magnesium loses an electron. For both marks, say that it loses two electrons and forms a 2+ ion. Want me to explain why?

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Handwritten answer

Particles gain kinetic energy, move faster and collide more often…

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Describe and explain how temperature affects the speed of diffusion.

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