(A) USA
(B) France
(C) Former USSR
(D) Italy
Author:
The Lyman transition involve:
(A) Largest changes of potential energy
(B) Smallest changes of potential energy
(C) Smallest changes of total energy
(D) Largest changes of total energy
The ionization potential of an atom in ground state is 16 V. Its first excitation energy is:
(A) 8 eV
(B) 12 eV
(C) 4 eV
(D) 16 eV
Ionization energy of Hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon of energy 12.1 eV. The No. of spectral lines emitted by hydrogen atoms according to Bohr’s theory will be:
(A) One
(B) Three
(C) Two
(D) Four
According to Bohr’s Atomic Model:
(A) An atom has heavy, negatively charged nucleus
(B) The electron radiate energy only when it jumps to inner orbit
(C) The electron can move only in particular orbit
(D) Both B & C
Which of the following series of the hydrogen atom possess photons of longest wavelength?
(A) Lyman
(B) Bracket
(C) Balmer
(D) Pfund
The ionization energy of hydrogen atom is 13.6 eV. The energy require to remove an electron from 2nd orbit is:
(A) 13.6 eV
(B) 9.5 eV
(C) 3.4 eV
(D) 1.5 eV
Which of the following transition in the hydrogen atom gives and emission of highest frequency?
(A) n = 2 to n = 1
(B) n = 4 to n = 3
(C) n = 3 to n = 2
(D) n = 5 to n = 2