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The atomic number Z of an atom represents the:
NTS 2018
Physics
Atomic Structure
Elimination Tool:
The relationship between quantum number n and l is:
PMC 2020
Chemistry
Atomic Structure
Elimination Tool:
The Balmer series lies in which region of the electromagnetic spectrum?
NTS 2015 DUHS and JSMU
Chemistry
Atomic Structure
Elimination Tool:
“In an atom no two electrons can have the some set of four Quantum numbers” is stated by:
NTS 2013
Chemistry
Atomic Structure
Elimination Tool:
Electronic configuration of M2+ ion is 2, 8, 14 and its atomic weight is 56 amu. The number of neutrons in its nucleus are:
NTS 2017
Chemistry
Atomic Structure
Elimination Tool:
Which of the following does not show variable valency?
NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:
The amount of energy associated with quantum of radiation is directly proportional to:
NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:
Choose the value of the Rydberg constant among the following values:
NUMS 2014
Chemistry
Atomic Structure
Elimination Tool:
The radii of the second orbit of the hydrogen atom calculated from Bohr’s model is:
NTS 2013
Chemistry
Atomic Structure
Elimination Tool:
How many electrons can have the values n=2, l=1, and s=+½ in the configuration 1s2, 2s2, 2p3?
NTS 2015 DUHS and JSMU
Chemistry
Atomic Structure
Elimination Tool:
Quantum number values for ‘2p’ orbitals are:
PMC 2020
Chemistry
Atomic Structure
Elimination Tool:
Many elements have fractional atomic masses. This is because:
NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:
The spectrum of He is expected to be similar to that of:
NUMS 2014
Chemistry
Atomic Structure
Elimination Tool:
Which of the following best describes the emission spectrum of atomic hydrogen?
NTS 2015 DUHS and JSMU
Chemistry
Atomic Structure
Elimination Tool:
Which of the following has the maximum number of unpaired electrons?
NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:
Nitrogen and phosphorus have 3 of their valence electrons unpaired because of:
NTS 2014
Chemistry
Atomic Structure
Elimination Tool:
Maximum ____ electrons can be placed in one orbital:
NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:
For a multi-electron atom, the highest energy level among the following is:
NTS 2013
Chemistry
Atomic Structure
Elimination Tool:
Which of the following has lowest e/m ratio?
PMC 2020
Chemistry
Atomic Structure
Elimination Tool:
The difference between soft and hard X-rays is of:
NUMS 2016
Physics
Atomic Structure
Elimination Tool:
Which of the following orbital will be filled first than 4p?
NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:
The amount of energy released by absorbing an electron in the valence shell is:
NTS 2013
Chemistry
Atomic Structure
Elimination Tool:
Which one of the following is not an isotope of hydrogen:
NUMS 2014
Chemistry
Atomic Structure
Elimination Tool:
Diameter of an atom is in the range of?
NUMS 2014
Chemistry
Atomic Structure
Elimination Tool:
If an electron of hydrogen atom jumps from 5th orbit to 7’h orbit, its atomic radius increases
Which of the following fundamental particles have the same mass/kg?
NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:
An element has configuration 2, 8, 1. It belongs to, ______.
NTS 2016 SMBBMC
Chemistry
Atomic Structure
Elimination Tool:
If uncertainty in the position of an electron is zero the uncertainty in its Momentum is?
NTS 2015 DUHS and JSMU
Chemistry
Atomic Structure
Elimination Tool:
The number of electrons present in n=2 , l = 1 and m = 1, 0, -1 are:
NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:
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?
The electronic configuration of iron is:
NTS 2011
Chemistry
Atomic Structure
Elimination Tool:
The lightest positive rays obtained is from:
NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:
Which of the following does not have an inert gas configuration?
NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:
The maximum possible number of electrons a shell ‘n’ can accommodate is given by:
NTS 2012
Chemistry
Atomic Structure
Elimination Tool:
The ground state of an atom corresponds to a state of :
NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:
The maximum number of electrons in an atom with n=3 and l=2 is:
NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:
The maximum number of electrons that an orbital can accommodate is/are:
NTS 2010
Chemistry
Atomic Structure
Elimination Tool:
Which of the following statements is correct?
NTS 2011
Chemistry
Atomic Structure
Elimination Tool:
Which of the following is the electronic configuration of 19K?
NUMS 2016
Chemistry
Atomic Structure
Elimination Tool:
The radius of the third Bohr orbit is:
NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:
When B- particles are sent through a thin metal foil, most of them go straight through the foil as:
NTS 2017
Chemistry
Atomic Structure
Elimination Tool:
The quantum numbers +½ and -½ for the electron spin represent:
NTS 2017
Chemistry
Atomic Structure
Elimination Tool:
Which pair has 1 electron in it’s ‘s’ orbital?
PMC 2020
Chemistry
Atomic Structure
Elimination Tool: