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Spectrum of which series is in the UV region?
NET
NUST Entry Test
Chemistry
Atomic Structure
Spectrum of which series is in the visible region?
NET
NUST Entry Test
Chemistry
Atomic Structure
The velocity of electron in the outermost shell is?
NET
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Chemistry
Atomic Structure
Potential Energy of an electron in the orbit of an atom is
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NUST Entry Test
Chemistry
Atomic Structure
Breaking of a neutron produces?
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Chemistry
Atomic Structure
If an electron of hydrogen atom jump from 5th orbit to 7th orbit, its atomic radius increases by
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Chemistry
Atomic Structure
If an electron makes a transition from 4th orbit to inner orbits, then the wavelength for which the radius is maximum, lies in which of the following series?
NET
NUST Entry Test
Chemistry
Atomic Structure
Diameter of Hydrogen atom is?
NET
NUST Entry Test
Chemistry
Atomic Structure
The correct order of orbitals is
NET
NUST Entry Test
Chemistry
Atomic Structure
According to the Aufbau principle the electrons are added first to the orbital:
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Chemistry
Atomic Structure
Hund's rule states that when electrons enter to the same sub-levels they are:
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Chemistry
Atomic Structure
Pauli exclusion principle states that no two electrons in a given orbital have:
NET
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Chemistry
Atomic Structure
An atom has an electronic configuration $1s^{2},/:2s^{2},/:2p^{3}$.The number of unpaired electrons in this atom is:
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NUST Entry Test
Chemistry
Atomic Structure
Which one of the following has the same number of electrons as an alpha particle?
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NUST Entry Test
Chemistry
Atomic Structure
The electron configuration of $H^{-}$ is:
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Chemistry
Atomic Structure
Maximum number of electrons that can be accommodated in a shell is given by:
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Chemistry
Atomic Structure
An orbital like $s_{1},/:p_{x},/:p_{y},/:p_{z}$ and $d_{xy}$ can have at the most:
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NUST Entry Test
Chemistry
Atomic Structure
WHat is the value of n + l ( principle and Azimuthal quantum numbers) for 3rd orbital?
NET
NUST Entry Test
Chemistry
Atomic Structure
If uncertainty in position of electron is zero, the uncertainty in its momentum would be:
NET
NUST Entry Test
Chemistry
Atomic Structure
Which atomic orbital has lowest energy?
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NUST Entry Test
Chemistry
Atomic Structure
Which one of the following orbitals has high energy?
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Chemistry
Atomic Structure
If value of Azimuthal quantum number is '1' the atomic orbital is:
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Chemistry
Atomic Structure
The shape of an orbital is determined by:
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Chemistry
Atomic Structure
Two electrons in the atom:
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Chemistry
Atomic Structure
As the quantum number n increases, the energy difference between adjacent energy level:
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Chemistry
Atomic Structure
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