Isotones are nuclei having
Same atomic numbers
Same mass number
Same number of protons
Same number of neutrons
Which theory observed that the ground state of nitrogen atom has 3 unpaired electrons in its electronic configuration ?
Heisenberg's uncertainty principle
Pauli's exclusion principle
Aufbau principle
Hund's rule of maximum multiplicity
The wave length of the first line of Balmer series of hydrogen atom is 6561Ao. The wave length of the third line of the series is
2180 Ao
4339 Ao
13122 Ao
5865 Ao
What is the maximum number of electrons in an atom that can have the quantum numbers n = 3, ml = +1 ?
8
4
16
6
The ground state of an atom means that all the electrons are?
Having the same energy
In the lowest possible energy state
In the first orbit
In the nucleus
How many number of spherical nodes will be in 4p orbitals ?
1
3
2
Zero
What is the number of electrons in K19 which have n = 3 and l = 1 ?
What is the ratio between the energy of a photon of 1500 Ao wave length radiation to that of 3000 Ao wave length radiation ?
1/4
1/2
What is the frequency ratio between two radiations of wave length 400nm and 700nm in the visible spectrum ?
14/8
4/7
8/14
15/8
What will be the total spin resulting from a d6 configuration?
3/2
