True: Copper is an element., An element is a substance made of ONE kind of atom., Most of the atoms in the world are mixed up or joined together., A budgerigar is NOT an element, False: All the substances in the world are elements., If hydrogen is a gas and oxygen is a gas, then H2O must be a gas., Copper is made of 2 kinds of atoms., Water is an element.,

Video 4 C (hard)

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