Which of the following properties indicate that an element is a metal. It

I. reacts with oxygen to form an acidic oxide

II. forms ionic chlorides

III. has variable oxidation states

IV. displaces hydrogen from dilute HCl

  • A reacts with oxygen to form an acidic oxide
  • B I and III only
  • C I and II only
  • D II and IV only
  • E I, II, III and IV
waec 2022chemistry

The correct answer is C. I and II only

- Ionization behaviour; The atoms of non-metals usually have four to seven valence electrons. They have a great tendency to ionize by accepting electrons to form negative ions.

- Reaction with acids; A metal which is more electro positive than hydrogen readily displaces the hydrogen ion, H+, from an acid.

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