Atomic StructureMass Spectrometry51Choose the best answerIsotopes of an element are recorded separately by a:AMass spectrometerBSpectrophotometerCCalorimeterDIR spectrophotometer Like 0 Discuss 0Share
Atomic StructureIsoelectronic Species52Choose the best answerWhich of the following are isoelectronic species? I. CH₃⁺ II. NH₂⁻ III. NH₄⁺ IV. NH₃AI, II, IIIBII, III, IVCI, II, IVDI and II Like 0 Discuss 0Share
Atomic StructureAufbau Principle and Hund's Rule53Choose the best answerThe Aufbau principle alone cannot determine:AThe order in which subshells are filledBWhich lower-energy subshell is occupied firstCRelative filling sequence of subshellsDDistribution of electrons among degenerate orbitals Like 0 Discuss 0Share
Atomic StructureShells, Subshells and Orbitals54Choose the best answerFor the principal quantum number n = 3, the numbers of possible subshells and orbitals are respectively:A3 and 5B3 and 7C3 and 9D2 and 5 Like 0 Discuss 0Share
Atomic StructureHund's Rule55Choose the best answerWhich rule states that degenerate orbitals are occupied singly before electron pairing occurs?APauli exclusion principleBHund's ruleCAufbau principleDHeisenberg uncertainty principle Like 0 Discuss 0Share