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Two properties of four substances A, B, ...

Two properties of four substances A, B, C and D are given in the table.

Which of these substances in most likely a metal and why ?

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A is a metal. Metals have a high melting point and they are good conductors of electricity in both solid and molten form B has a high melting point but it does not conduct electricity in solid form. C is a poor conductor of electricity and D has a low melting point and is poor conductor of electricity hence, only A can be a metal.
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