Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#X-Rays126Choose the best answerWhich conditions are required to produce X-rays in a discharge tube?AHigh voltage and very low pressureBLow voltage and atmospheric pressureCLow voltage and high pressureDAtmospheric pressure without an applied potential Like 0 Discuss 0Share
Atomic StructureQuantum Numbers127Choose the best answerWhich set of quantum numbers is impossible?An = 3, ℓ = 2, mℓ = 0, mₛ = −½Bn = 3, ℓ = 2, mℓ = −2, mₛ = −½Cn = 3, ℓ = 3, mℓ = −3, mₛ = −½Dn = 3, ℓ = 0, mℓ = 0, mₛ = −½ Like 0 Discuss 0Share
SZABMU MDCAT 2025 Chemistry#Atomic Structure#Quantum Numbers128Choose the best answerNumber of electrons with l=2 in an atom having atomic number 23 is: (SZABMU MDCAT 2025)A2B3C4D5 Like 1 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Photon Energy129Choose the best answerIn ΔE = E₂ − E₁ = hν, what does ν represent?APlanck’s constantBFrequency of radiationCWave numberDAngular momentum Like 0 Discuss 0Share
Atomic StructureEnergy of Hydrogen Atom130Choose the best answerThe negative electronic energy of a hydrogen atom indicates that:AThe electron has maximum energy at n = ∞BA bound electron has greater energy than a free electronCA bound electron has lower energy than a free electron at rest at infinityDElectronic energy decreases as the electron moves away from the nucleus Like 0 Discuss 0Share