The orbital diagram for a ground state nitrogen is A) A B) B C) C D) D The elect

Question

The orbital diagram for a ground state nitrogen is A) A B) B C) C D) D The electron configuration of an atom shows A) the number of isotopes possible. B) a description of the shape of each electron energy level. C) the number of electrons in each electron energy level. D) a diagram of an atomic nucleus. E) the maximum number of electrons each electron energy level can hold. What is the correct electron configuration for the lithium atom? A) 1s^3 B) 2s^1 C)1s^1 2s^2 D) 1s^2 2S^1 E) 1d^2 2s^3 What is the symbol of the element with the electron configuration 1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 4 s^2 3 d^10 4 p^5? A) Cl B) Mn C) Br D) Se E) F The abbreviated electron configuration for the iron atom is ___________. A) 1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 4 s^2 3 d^6 B) [He] 2 s^2 2 p^6 3 s^2 3 p^6 4 s^2 3 d^6 C) [Ne] 3 s^2 3 p^6 4 s^2 3 d^6 D) [Ar] 3 s^2 3 d^6 E) [Ar] 4 s^2 3 d^6

Explanation / Answer

25 .Nitrogen has an atomic no. Of 7.

So 7 electrons will be filled as-

1s(||) 2s(||) 2p(|||)

First all 5 orbitals will be filled,one 1s,one 2s,three 2p,then the remaining two will be filled in anti spin order in 2s and then 2s.the spins will be opposite in paired orbitals.

The rule here is first every orbital should be singly filled then doubly filled.

Option A.

26. E.the electronic configuration of an atom shows the maximum number of electrons each orbital can hold.

27.D.lithium has 3 electrons so it will be filled as,

1s22s1.first both orbitals of 1s and 2s will be singly filled then the remaining electron will go to 1s electron as electrons are filled in increasing energy level of orbitals.

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