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St06 Some substances are malleable others are brittle

Copper and aluminium are metals, Pfennig coins are mixtures of different metals, carbon (pencil lead) and sulfur are called non metals.
* Left and photo 1, 2: The three metal samples can be hammered. They are malleable.
* Photos 3, 4, right: A pencil lead (C) and a sulfur piece burst by treating with a hammer.
  This property of a substance is called non-malleable = brittle.