what are the physical and chemical properties of calcium?
['Color: Silvery-white metallic.', 'Phase: Solid.', 'Hardness: Relatively soft metal.', 'Crystalline structure: Cubic.', 'Ductility: It can be beaten into extremely thin sheets. ... ', 'Malleability: Capable of being shaped or bent.', 'Melting point: Melting point is 851°C.']