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AP EAMCET2001ChemistryStructure of Atom

In the ground state, an element has 13 electrons in M shell. The element is

Options

  1. Acopper
  2. Bchromium
  3. Cnickel
  4. Diron

Correct answer

B. chromium

Step-by-step solution

M shell =3 rd shell Electronic configuration =1 s^2, 2 s^2, 2 p^6, 3 s^2, 4 s^1, 3 d^5 Number of e⁻ in 3rd shell =3 s^2, 3 p^6, 3 d^5=2+6+5=13 Total e⁻=24 So, the element is Cr .

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