A standing wave in a string 35 cm long has a total of six nodes, (including those at the ends). Hence, wavelength of the standing wave is:
14 cm
5.826 cm
7 cm
17.5 cm.
In some regions of space around nucleus =0; this region is called:
Nucleus
Spherical nodes
Orbital
Orbit
Highest electron probability in Is orbital exists at a point in the vicinity of:
Spherical nodes
Circumference
Nucleus
Plane
Select correct statement:
|(| measures the electron probability density at a point in an atom
( and |(| vary as a function of the three coordinates
Both are correct
None is correct
Select correct statement:
Radial probability function gives the probability of finding the electron at a distance r from the nucleus
The maximum in the curve corresponds to the distance at which the probability of finding the electron is maximum.
This distance is called the radius of maximum probability (52.9 pm for hydrogen)
All the statements are correct
If the nitrogen atom has electronic configuration 1s7
It would have energy lower than of the normal ground state configuration 1s22s22p3, because the electrons would be closer to the nucleus. Yet 1s7 is not observed because it violates.
Heisenberg uncertainty principle
Hund’s rule
pauli exclusion principle
Bohr postulate of stationary orbits
The radius of which of the following orbit is same as that of the first Bohr’s orbit of hydrogen atom?
He+ (n=2)
Li2+ (n=3)
Li2+ (n=1)
Be3+ (n=4)
The number of radial nodes of 3s and 2p orbitals are respectively
2,0
0,2
1,2
2,1
The sum of the number of neutrons and proton in the isotope of hydrogen is:
6
5
4
3
The energy of an electron in the first Bohr orbit of H atom is -13.6 eV. The possible energy value(s) of the excited state(s) for electrons in Bohr orbits of hydrogen is (are)
-3.4 eV
-4.2 eV
-6.8 eV
+6.8 eV