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O Level Chemistry MCQs (O Level) From Textbook

O Level Chemistry MCQs – Certification Test 138

Periodic Table: O Level Chemistry MCQs (Question 138) – App & e-Book Download

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MCQ 138: Elements with 1-3 valence electrons are called:

  1. metals
  2. non-metals
  3. inert gases
  4. amphoteric oxides

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