Atomic StructureIsobars226Choose the best answerWhich pair represents isobars?A³₂He and ⁴₂HeB²⁴₁₂Mg and ²⁵₁₂MgC⁴⁰₁₉K and ⁴⁰₂₀CaD³⁹₁₉K and ⁴⁰₁₉K Like 0 Discuss 0Share
Atomic StructureElectronic Configuration227Choose the best answerThe ground-state electronic configuration of Cu is:A[Ar] 3d⁹4s²B[Ar] 3d²4s²C[Ar] 3d¹⁰4s¹D[Ar] 3d⁹4s⁰ Like 0 Discuss 0Share
Atomic StructureAufbau Principle228Choose the best answerThe sequence in which electrons fill subshells of increasing energy is explained by:AHund's ruleBOctet ruleCAufbau principleDHeisenberg uncertainty principle Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Quantum Numbers229Choose the best answerWhat is the maximum number of orbitals in a shell with principal quantum number n?A2n²Bn²C2nDn Like 1 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Quantum Numbers230Choose the best answerHow many angular nodal planes are present in an s orbital?AOneBTwoCZeroDThree Like 0 Discuss 0Share