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Q A trivalent impurity has______________valence electrons?
  • A A. 4
  • B B. 5
  • C C. 6
  • D D. 3
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Word of the Day
16 Jul
Volatile
(of a substance) easily evaporated at normal temperatures.
Ψ¨Ψ―Ω„ΨͺΫ’ Ω…Ψ²Ψ§Ψ¬ ΩˆΨ§Ω„Ψ§ΨŒ کافور ءفΨͺ

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