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Manipal MET2011ChemistryStructure of Atom

An element M has an atomic mass of 19 and atomic number 9 , its ions is represented by

Options

  1. AM⁺
  2. BM²⁺
  3. CM⁻
  4. DM²⁻

Correct answer

C. M⁻

Step-by-step solution

Configuration of an element ₉ M=1 s^2, 2 s^2, 2 p^5 . Hence, its ion will be M ⁻ because it can easily gain one electron to have octet.

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