An element of atomic weight 40 has 2,8,8,2 as the electronic configuration. Which one of the following statements regarding this element is not correct

Options :
  1. it belongs to II group of the periodic table
  2. it has 20 neutrons
  3. the formula of its oxide is MO2
  4. it belongs to 4th period of the periodic table
Answer and Explanation :-

Answer: Option 3

Explanation:

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