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AP EAMCET2001ChemistryClassification of Elements and Periodicity in Properties

The element with atomic number 12 belongs to ......... group and ......... period

Options

  1. ALA, third
  2. BIII A, third
  3. CII A, third
  4. DII A, second

Correct answer

C. II A, third

Step-by-step solution

Electronic configuration of Z=12 is 1 s^2, 2 s^2, 2 p^4, 3 s^2 Number of electrons in least orbit =2 i.e., group = II A Valence shell is 3 rd shell, so period =3 period

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