WorksheetsTG-2
Total questions: 12
Worksheet time: 11mins
Choose the correct statement regarding the energy levels of hydrogen-like atoms:
the ground state corresponds to the 2s¹ electronic configuration
the energy of the 2p orbital is higher than that of the 2s orbital
the energy of the 2s orbital is higher than that of the 2p orbital
all 3s, 3p, and 3d orbitals have the same energy
Choose the correct statement regarding the radial wavefunction R(r) in hydrogen-like atoms:
It is maximum when
r → 0 for s-type orbitals
The orbital 2p has 2 radial nodes
It is maximum when
r → 0 for p-type orbitals
The orbital 2p has 1 radial node
Choose the correct statement regarding the angular wavefunction, γ(θ,φ),of the hydrogen-like atoms:
The number of angular nodes is n (principal quantum number)
The orbital 2s has 1 angular node
The orbital 2p has no angular nodes
The number of angular nodes is l (angular momentum quantum number)
Which of the following combinations of quantum numbers is not correct?
n = 1
l = 0
ml = 0
n = 3
l = 3
ml = 0
n = 4
l = 3
ml = -1
n = 2
l = 0
ml = 0
Choose the correct statement regarding the energy of orbitals in multielectronic atoms:
All orbitals in the same electronic shell have the same energy
All orbitals in the same electronic sub-shell have the same energy
Orbitals in 2p sub-shell have lower energy than those in the 2s sub-shell
Sub-shell 3d has 3 energetically degenerated orbitals
The atomic radius decreases as we move from left to right across a period in the Periodic Table because:
The atom's electronegativity increases
The atom's electronegativity decreases
Inter-electronic repulsion decreases
The effective nuclear charge (Zeff) increases
Choose the correct answer regarding the C-O bond order in CO₂ and [CO₃]²⁻
Both compounds have the same C-O bond order
The C-O bond order in CO₂ is greater than in [CO₃]²⁻
The C-O bond order in CO₂ is less than in [CO₃]²⁻
The C-O bond order in CO₂ is 1.5 and in [CO₃]²⁻ it is 1.33
The molecular geometry of XeOF4 molecule is:
Trigonal bipyramidal
Octahedral
"see-saw" geometry
Square Pyramidal
Gillespie geometry (electron group geometry) of XeO2F2 is:
AX4E
AX4
AX4E2
AX3E2
Indicate which of the following molecules is polar:
PCl5
CO2
PCl3
C2H4
In the PCl₂F₃ molecule, experiments find:
wo different P-Cl distances and two different P-F distances
One P-Cl distance and one P-F distance
Two different P-Cl distances and three different P-F distances
One P-Cl distance and two different P-F distances
From the molecular orbital diagrams of O₂, O₂²⁻, and O₂²⁺, we can determine that:
Only O₂ is paramagnetic
Both O₂ and O₂²⁻ are paramagnetic
Both O₂ and O₂²⁺ are paramagnetic
None of the three compounds is paramagnetic
