Category: Atomic Structure

A. when electrons jump down to 2nd- orbit
B. when electrons jump down to 3rd- orbit
C. when electrons jump down to 4th- orbit
D. when electrons jump down to 5th- orbit

A. de-Broglie
B. Plancks
C. Schrodinger
D. Heisenberg

A. Attractive forces
B. Repulsive force
C. Electrons
D. Neutrons

A. Gamma-rays
B. Alpha-rays
C. Beta-rays
D. X-rays

A. By burning of gas
B. By cooling of the gas
C. By the bombardment of cathode rays on gas molecules
D. From anode like cathode rays produced from cathode

A. Degenerate orbitals
B. Bonding molecular orbitals
C. Anti bonding molecular orbitals
D. Half filled orbitals

A. Brighter
B. Darker
C. Colourless
D. Hard to locate

A. n
B. 1
C. m
D. s

A. J.J Thomson
B. Millikan
C. Rutherford
D. Perrin

A. Angular momentum of electrons in multiples of h/2?
B. Electrons revolve in discrete circular orbits
C. Energy of each electron is directly proportional to n2
D. Electrons radiate energy continuously in a given orbit.