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WorksheetsAtomic Structure
Total questions: 13
Worksheet time: 39mins
What is the ration of time periods (T1/T2) in second orbit of hydrogen atom to third orbit of He+ ion?
8/27
32/27
27/32
None of These
How do the energy gaps between successive electron energy levels in an atom vary from low to high n values?
All energy are the same
The energy gap decreases as n increases
The energy gap increases as n increases
Energy gap changes unpredictibly as n increases
V on two particles A and B are plotted against de- Broglie wavelengths. Where V is the potential on the particles. Which of the following relation is correct about the mass of particles?
mA=mB
mA>mB
mA<mB
mA ≤ mB
The probability of finding electrons in dxy orbital is:
along X- and Y- axis
along X- and Z-axis
along Y- and Z- axis
at an angle of 450 with X- axis
Wave function of an orbital is plotted against the distance from nucleus. The graphica; representation is of:
1s
2s
3s
2p
Which of the following set of quantum numbers describes the electron which is removed most easily from a potassium atom in its ground state?
n=3, l=1, ml=1, ms= -1/2
n=2, l=1, ml=0, ms= -1/2
n=4, l=0, ml=1, ms= +1/2
n=4, l=0, ml=0, ms= +1/2
The variation of radial probability density R2(r) as a function of distance r of the electron from the nucleus for 3p-orbital :
Maximum number of total nodes is present in :
5s
5p
5d
All have same number of nodes
Energy required to ionise 2 mole of gaseous He+ ion present in its ground state is :
54.4 eV
108.8NA eV
54.4NA eV
108.8 eV
Which quantum number defines the orientation of orbital in the space around the nucleus?
Principle quantum number (n)
Angular momentum quantum number (l)
Magnetic quantum number (ml)
Spin quantum number (ms)
The mass of a particle is 10-10 g and its radius is 2 × 10-4 cm. If its velocity is 106 cm sec-1 with 0.0001% uncertainty in measurement, the uncertainity in its position is :
5.2 × 10-8 m
5.2 × 10-7 m
5.2 × 10-6 m
5.2 × 10-9 m
a
b
c
d
a
b
c
d
