(ii) Copper and potassium have different melting points and boiling points.
Give one other difference between the properties of copper and potassium.

ExplanationWhat are the properties of potassium?

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Potassium metal is soft and white with a silvery lustre, has a low melting point, and is a good conductor of heat and electricity. Potassium imparts a lavender colour to a flame, and its vapour is green. It is the seventh most abundant element in Earth's crust, constituting 2.6 percent of its mass.:

Explanation: Potassium metal is soft and white silvery lustre. it has low melting point and good conductor of heat and electricity. Copper is malleable and ductile and an extremely good conductor of heat and electricity.

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c- cold periods in earth's history during which glaciers covered much of the surface.

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