Atomic Structure Test

Result

Atomic Structure Test - 9

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Question 1
1 / -0

The following question has four choices, out of which ONLY ONE is correct.

An orbit differs from an orbital in that

A
it represents the region of maximum probability

B
it represents the planar motion of an electron

C
it describes a path which is in accordance with the uncertainty principle

D
it represents a dumbbell shape

Solution

An orbit differs from an orbital as it represents the planar motion of an electron.
Question 2
1 / -0

What is the electronic configuration of Mn²⁺?

A
[Ne] 3d⁵, 4s⁰

B
[Ar] 3d⁵, 4s²

C
[Ar] 3d⁵, 4s⁰

D
[Ne] 3d⁵, 4s²

Solution

Electronic configuration of Mn (25) is 1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁵, 4s².
∴ Electronic configuration of Mn2+ is [Ar] 3d5, 4s0.
Question 3
1 / -0

The maximum number of electrons having n = 1, l = 0, m = 0, and s = ±1/2, is

A
2

B
1

C
3

D
4

Solution

The given values of quantum numbers correspond to 1s orbital, which can accommodate a maximum of 2 electrons.
Question 4
1 / -0

If 3d orbitals are completely filled, the new electron will enter in

A
4s orbital

B
4p orbital

C
4d orbital

D
3p orbital

Solution

If 3d orbitals are completely filled, the new electron will enter in 4p orbital.
Fill the orbitals in this order:
1s² 2s² 2p⁶ 3s²3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰7p⁶