1.
The number of electrons in 3d sub shell for element with atomic number 26 is
A
4
B
6
C
8
D
10
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The number of electrons in 3d sub shell for element with atomic number 26 is
4
6
8
10
The correct set of four quantum numbers for valence electron of Rubidium(37) is
5, 1, 1, +1/2
5, 0, 0, +1/2
6, 0, 0, +1/2
5, 1, 0, +1/2
The maximum number of electrons in a sub shell with, l=3 and n=4 is
14
16
10
12
The line spectrum of He+ ion will resemble that of
Hydrogen atom
Helium atom
Li+ ion
Lithium atom
Deuterium nucleus contains
1p+1n
2p+0n
1p+1e
2p+2n
Which of the following ion have electronic configuration; {Ar} 3d6?
Ni+3
Mn+3
Fe3+
Co+3
The measurement of the electron position is associated with an uncertainty in momentum which is equal to 10-18 g cm /s. The uncertainty in electron velocity(cm/s) is; (me = 9.1 x 10-28 g)
What is the maximum of electrons in an atom that can have the quantum numbers, n=4, ml=+1?
4
15
3
6
The orientation of an atom is governed by
Principle quantum number
Spin quantum number
Azimuthal quantum number
Magnetic quantum number
The energy of second Bohrs orbit of hydrogen atom is -328 kj/mol. Hence the energy of fourth orbit would be
-41 kj/mol
-164 kj/mol
-82 kj/mol
-1312 kj/mol
For principle quantum number n=4, the number of orbitals having l=3 is
3
7
5
9
The value of Planks constant is 6.62 x 10-34 js. The velocity of light is 3 x 108 m/s. which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 x 1015 s ?
40
5 x 10-18 3 x 107
The quantum number m of a free gaseous atom is associated with
The effective volume of the orbital
The spatial orientation an orbital
The shape of orbital
the energy of the orbital in the absence of the magnetic field
Quantum numbers n=2,l=1 represent
1s orbital
2p orbital
2s orbital
3s orbital
Iso-electronic species are
F-,O-2
F-,O+
F-,O
F-,O+2
The correct order of increasing energy of atomic orbitals is
5p<4f<6s<5d
4f<5p<5d<6s
5p<6s<4f<5d
5p<5d<4f<6s
Azimuthal quantum number defines
e/m ratio of electron
Angular momentum of electron
Spin of electron
Magnetic momentum of an electron
The following quantum numbers are possible for how many electrons? n=3, l=2, m=+2
1
2
18
4
What is the wavelength of light. Given energy =3.03 x 10-19 j, h=6.62 x 10-34 js and c=3.0 x 10 8 m/s?
6.54nm
654nm
0.654nm
65.4 nm
The species which is not paramagnetic among the following is;
Cl-
Be-
Ne+2
As+