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Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
MCQ
Atomic number of calcium is?
  • A
    18
  • B
    19
  • C
    20
  • D
    21
✓

Answer

  1. 20

Explanation:

The number o protons found in the nucleus of an aumbtom of a given element is called atomic ner. Elements are placed in periodic table according to their atomic numer.

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