Questions 20-24 refer to atom for which the occupied atomic orbitals are shown b

Question

Questions 20-24 refer to atom for which the occupied atomic orbitals are shown below 1s 2s 1s 2s 1s 2s 2p 1s 2s 2p 4s Represents an atom that is chemically unreactive Represents an atom in an excited state represents an atom that has four valence electrons represents an atom of a transition metal The ionization energies for element X are listed in the table above. On the basis of the is most likely to be Na Mg Al Si P In the periodic table, as the atomic number increases from 11 to 17, what happens to It remains constant In increases only

Explanation / Answer

Answer – We are given the atomic orbital with showing electrons from a to e. We need to answer the following question from 20 to 23.

We know the chemical unreactive means we need to look such atoms orbital which is fully filled and no any unpaired electrons, so it is d.

20 = d

Excited state means the electron goes from the lower energy level to higher energy level.

So, 21 = a

We know valance electron means the last or outer orbital electrons, we need 4 valance electrons and four electron in the c

So, 22 = c

We know tradition metal also called d-block has outermost orbital is d, since they are also called d-block element, so

23 = e

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