MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryPeriodic PropertiesModern Periodic Table
An element ‘X’ belongs to the fourth period and fifteenth group of the Periodic Table. Which one of the following is true regarding the outer electronic configuration of ‘X’. It has
A.Partially filled ‘d’orbitals and completely filled ‘s’
B.Completely filled ‘s’orbitals and completely filled
C.Completely filled ‘s’orbitals and half-filled ‘p’✓ Correct
D.Half-filled ‘d’orbitals and completely filled ‘s’
Explanation
Given, element X belongs to the fourth period and fifteenth group, thus the outermost shell of element X is 4 and the number of outermost electrons present is 5. PERIODIC PROPERTIES 34 Thus, the electronic configuration of element X will be 2 2 6 2 6 2 10 3 1s 2s 2p 3s 3p 4s 3d 4p . Therefore, it has completely filled ‘s’ orbital and half-filled ‘p’ orbitals.
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