WorksheetsStructure of Atom
Total questions: 20
Worksheet time: 20mins
The spectral line in hydrogen spectrum obtained when the electron jumps from n=5 to n=2 energy level belongs to:
Lyman series
Balmer series
Paschen series
Pfund series
The correct set of four quantum numbers for the balance electron of rubidium atom
(z=37) is
5, 1, 1, +1/2
6, 0, 0, +1/2
5, 0, 0, +1/2
5, 1, 0, -1/2
In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the
Wavelength of incident light
Frequency of incident light
Velocity of incident light
Atomic mass of the element
Which spectra is known as fingerprint spectra?
Continuous emission spectra
Line emission spectra
Absorption spectra
What are the possible values of the magnetic quantum number for an electron in a 3p orbital?
-3, -2, -1, 0, +1, +2, +3
-2, -1, 0, +1, +2
-1, 0, +1
0
The probability of finding the electron in a certain space around the nucleus is known as:
Schrödinger's equation
Wavefunction
Orbital
Quantum numbers
The correct electronic configuration of Cr (Z=24) is
[Ar] 3d 5 4s 1
[Ar] 3d 4 4s 2
[Ar] 3d 9 4s 2
[Ar] 3d 10 4s 1
Which of the above is violation of Pauli’s exclusion principle ?
A
B
C
D
The radius of first orbit of hydrogen is 0.53 Å. The radius of second orbit would be
1.06 Å
0.26 Å
0.53 Å
2.12 Å
The energy of an electron in 3rd orbit of hydrogen atom is:
-1311.8 kJ/mol
-82.0 kJ/mol
-145.7 kJ/mol
-327.9 kJ/mol
Which of the following radiations has largest energy?
λ = 30 nm
λ = 300 pm
ν = 3 x 10-12 s-1
ν = 3 x 10-10 s-1
The sub-shell with n=6, l=2 can accomodate a maximum of
10 electrons
12 electrons
36 electrons
72 electrons
Which of the following is isoelectronic with Ca2+
Fe3+
S2-
Mg2+
P
The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2 x 1014 s-1 is 6.63 x 10-20 J. The threshold frequency of the metal is
2 x 10-14 s-1
3 x 1014 s-1
1 x 1014 s-1
1 x 10-14 s-1
Uncertainity in the position of an electron (mass= 9.1 x 10-31 kg) moving with a velocity 300 m/s, accurate upto 0.001% will be
5.76 x 10-2 m
1.92 x 10-2 m
3.84 x 10-2 m
19.2 x 10-2 m
Which of the following has the maximum number of unpaired d-electrons?
Ni3+
Cu+
Zn2+
Fe2+
The quantum of light is
photon
neutron
electron
proton
Which is the isotone of 32Ge76 (atomic numberXmass number)
32Ge77
34Ge78
36Ge79
32Ge78
For principal quantum number n=4, the total number of orbitals having l=3 is
3
5
7
9
Which of the following is not possible?
n=3, l=2, m=0
n=1, l=0, m=0
n=3, l=3, m=2
n=4, l=3, m=-3
