Which element has the electronic configuration ending in 4s² 4p³ in its ground state?
The configuration 4s² 4p³ corresponds to As (Z=33, period 4, group 15), with full configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p³.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electronic Configuration and Types of Elements - s p d f Blocks
