(a) Read the following description of the element zinc and indicate which are physical properties and which are chemi- cal

Question

(a) Read the following description of the element zinc and indicate which are physical properties and which are chemi- cal properties. Zinc melts at 420 °C. When zinc granules are added to dilute sulfuric acid, hydrogen is given off and the metal dissolves. Zinc has a hardness on the Mohs scale of 2.5 and a density of 7.13 g/cm³ at 25 °C. It reacts slowly with oxygen gas at ele- vated temperatures to form zinc oxide, ZnO. 
(b) Which properties of zinc can you describe from the photo? Are these physical or chemical properties?

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