Atomic StructureElectronic Transitions and Emission of Energy1326Choose the best answerWhen an electron falls from a higher energy level to a lower energy level:AEnergy is emittedBEnergy is absorbedCAtomic number increasesDAtomic number decreases Like 0 Discuss 0Share
Atomic StructureIsotopes1327Choose the best answerThe isotope ¹⁸₈O contains:A18 protonsB9 protons and 9 neutronsC8 neutrons and no protonsD8 protons and 10 neutrons Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Neutron Discovery1328Choose the best answerWhich scientist discovered the neutron in 1932?AJames ChadwickBErnest RutherfordCJ.J. ThomsonDJohn Dalton Like 0 Discuss 0Share
Aldehydes and KetonesAlpha, Beta and Gamma Carbons1329Choose the best answerIn CH₃CH₂CH₂CHO, the γ-carbon is:AThe carbonyl carbonBThe CH₂ carbon adjacent to –CHOCThe terminal CH₃ carbonDNo γ-carbon is present Like 0 Discuss 0Share
Atomic StructureIsoelectronic Species1330Choose the best answerWhich of the following species are isoelectronic? I. CH₃⁺ II. NH₂⁻ III. NH₄⁺ IV. NH₃AI, II and IIIBII, III and IVCI, II and IVDI and II Like 0 Discuss 0Share