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Structure of the Atom — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
An element has electronic configuration 2, 8, 4. It will be classified as:
  • A
    Metal.
  • B
    Non-metal.
  • C
    Metalloid.
  • D
    Noble gas.
✓

Answer

  1. Metalloid.
Explanation:Quartz, an abundant ingredient in sand, is made up of non-crystallized silica. Silicon is neither metal nor non-metal; it's a metalloid, an element that falls somewhere between the two. Silicon is a semiconductor, meaning that it does conduct electricity.

ZElementNo. of electrons/shell
14Silicon2, 8, 4

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