Choose the odd one out. Give reasons for your choice.
gold, silver, copper, silicon

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Solution

Silicon is the odd one out.
Gold (Au), silver (Ag) and copper (Cu) are metals, whereas silicon (Si) is a metalloid.
Metalloid: Metalloids are a small group of elements founds in the periodic table of elements along the zigzag line that distinguishes metals from non-metals.Following are the elements that are considered to be metalloids:
Boron (B)
Silicon (Si)
Germanium (Ge)
Arsenic (As)
Antimony (Sb)
Tellurium (Te)
Polonium (Po)

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