Classify the following elements into metals, non–metals and metalloid: C, Mg, Si, S, Hg, As.
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Metals
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Non
– Metals
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Metalloids
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Mg
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C
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Si
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Hg
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S
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As
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Arrange the following metals in the decreasing order of chemical reactivity, Cu, Mg, Fe, Na, Ca, Zn.
Ans. The
arrangement of metals in the decreasing order of their chemical reactivity are
Na > Ca > Mg > Zn > Fe > Cu.