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Select the odd one out: (A) Copper (B) Gold (C) Silver (D) Steel
Copper
Gold
Silver
Steel
Steel
Identify whether the substances are elements or alloys; elements have chemical symbols and are found on the periodic table, while alloys are man-made mixtures.
Identify whether the substances are elements or alloys; elements have chemical symbols and are found on the periodic table, while alloys are man-made mixtures.
Analyze the nature of the substances
Copper (Cu), Gold (Au), and Silver (Ag) are chemical elements found in the periodic table. They exist in nature as pure substances.
Analyze the nature of Steel
Steel is an alloy, which is a metallic substance made by mixing iron with other elements like carbon. It is not a pure chemical element.
A: Copper is a pure chemical element; B: Gold is a pure chemical element; C: Silver is a pure chemical element.
D is correct because Steel is an alloy (a mixture of iron and carbon), whereas Copper, Gold, and Silver are pure chemical elements.
In odd one out questions involving materials, always check for the distinction between naturally occurring elements and man-made alloys or compounds.
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