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Chemical Effects of Electric Current — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceChemical Effects of Electric Current1 Mark
MCQ
Why are metals good conductors of electricity?
  • A
    In metals/ outer electrons are strongly bound to the atom.
  • ✓
    In metals, outer electrons are loosely bound to the atom.
  • C
    In metals, inner electrons are loosely bound to the atom.
  • D
    In metals, protons can detach from the nucleus and conduct electricity.
✓

Answer

Correct option: B.
In metals, outer electrons are loosely bound to the atom.
In metals, the attractive force on outermost electrons towards nucleus is feeble due to which they become free from atom when they get a little energy from outside. Such electrons are free to move anywhere inside the metal, but they are not free to move outside the metal.

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