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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
Question
The element which forms a basis oxide has the atomic number of:
  1. 18.
  2. 17.
  3. 14.
  4. 19.
✓

Answer

  1. 19.

Explanation:

Potassium (K) forms a basic oxide and has an atomic number of 19. The atomic numbers of 18, 17 and 14 correspond to acidic oxides.

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