EASY
JEE Main
IMPORTANT
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The wavelength associated with a golf ball weighing 200 g and moving at a speed of 5 m/h is of the order (Planck constant, h=6.626×10-34 J s):

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Important Questions on Structure of Atom

EASY
JEE Main
IMPORTANT
The energy of the second Bohr orbit of the hydrogen atom is -3.41 eV. The energy of the third Bohr orbit of the He+ ion will be
EASY
JEE Main
IMPORTANT
The quantum numbers +12 and-12 for the electron spin represents:
MEDIUM
JEE Main
IMPORTANT

Which hydrogen-like species will have the same radius as that of the first Bohr's orbit of the hydrogen atom?

EASY
JEE Main
IMPORTANT

The number of radial nodes in 3s and  2p, respectively, are:

 

EASY
JEE Main
IMPORTANT
The number of nodal planes in a px orbital is
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JEE Main
IMPORTANT
The energy of an electron in the first Bohr orbit of H-atom is -13.6eV. The possible energy value(s) of the excited state(s) for electrons in Bohr orbits of hydrogen is (are)
MEDIUM
JEE Main
IMPORTANT

The prominent yellow line in the spectrum of sodium vapour lamp has a wave length of 590 nm. What minimum accelerating potential is needed to excite this line in an electron tube containing sodium vapour? h=6.63×10-34 J·s, c=3×108 m s-1

Round off your answer to the nearest integer.

MEDIUM
JEE Main
IMPORTANT

If the energy difference between the ground state of an atom and its excited state is 4.4×10-19 J, The wave length of the photon (in meters) required to produce this transition is x2×10-7m. The value of x is

Round off your answer up to the nearest integer.