Question 24 Which element has the following orbital diagram? ou Na О Be Mg Question 25...

Question

Question

science chemistry

Answer 1

Answer #1

24.

Correct option: Mg

The valence shell electron configuration of alkali metals (e.g. Li, Na, K etc) = ns¹

The valence shell electron configuration of alkaline earth metals (e.g. Be, Mg, Ca etc) = ns²

Thus, the electron configuration belongs to either Be or Mg.

The total number of electrons in the element = 12

In neutral atoms, the number of electrons = the number of protons.

Hence, the atomic number of element = 12

Hence, the orbital diagram belongs to Mg.

25.

The valence shell electron configuration of ns²np⁴ belongs to chalcogens (e.g. O, S, Se etc)

The total number of electrons in the element = 8

In neutral atoms, the number of electron = the number of protons.

Hence, the atomic number of element = 8

Hence, the orbital diagram belongs to oxygen. Symbol = O.

Answer 2

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