Atomic Structuren + ℓ Rule46Choose the best answerWhich pairs of subshells have the same (n + ℓ) value? I. 2p and 3s II. 5s and 4p III. 7s and 4fAI onlyBII onlyCIII onlyDI, II and III Like 0 Discuss 0Share
Atomic StructureElectronic Configuration and Valency47Choose the best answerA neutral atom has the configuration: 1s² 2s² 2p⁶ 3s¹ Its usual valency is:A−2B+2C−1D+1 Like 0 Discuss 0Share
Atomic StructureMagnetic Quantum Number and Orbital Orientation48Choose the best answerAn orbital has quantum numbers n = 2, ℓ = 1 and mℓ = 0. It is commonly represented as:A1sB2sC2pₓD2pz Like 4 Discuss 0Share
Atomic StructureUnpaired Electrons in Ions49Choose the best answerWhich ion has the greatest number of unpaired electrons?AMg²⁺BTi³⁺CV³⁺DFe²⁺ Like 0 Discuss 0Share
Atomic StructureAufbau Principle50Choose the best answerWhich electronic configuration correctly follows the Aufbau filling order?A1s² 2s² 2p⁶B1s² 3p³ 3s²C1s² 3s² 3p⁶D1s² 2s² 3s² Like 0 Discuss 0Share