MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryPeriodic PropertiesPrevious Year Questions

The element with the electronic configuration as [Ar]3d10 4s2 4p3 represents a (JCECE 2010)

A.metal

B.non-metal

C.metalloid✓ Correct

D.transition element

Explanation

The electronic configuration of a given element is 10 3 Ar 3d 4p or 2 2 6 2 6 2 10 3 1s 2s 2p 3s 3p 4s 3d 4p . The atomic number is the number of protons or electrons in a neutral atom. Hence, the atomic number of the given element is 33 and the element is Arsenic. Therefore, the given element is metalloid.

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