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GK QUESTION#3285

Consider the following statements about elements in the periodic table:

1. Silicon is a metalloid with both metallic and non-metallic properties.

2. Iron and sodium are metals, while oxygen is a non-metal.

3. All metalloids are placed in Group 1 of the periodic table.

Which of the above statements is/are correct?

  1. AOnly 1 and 2Correct answer
  2. BOnly 1 and 3
  3. COnly 2 and 3
  4. DAll three statements
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Answer

A. Only 1 and 2

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Explanation

Silicon is conventionally classified as a metalloid. Iron and sodium are metals, whereas oxygen is a non-metal. Metalloids occur near the boundary between metals and non-metals rather than all belonging to Group 1, so only statements 1 and 2 are correct.

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