History of Atom & Discoveries Quiz

J.J. Thomson's atomic model is also called as

• Planetary model

• Plum pudding model

• Nuclear model

• Quantum model

Rutherford's gold foil experiment proved that

• Atom is indivisible

• Atom has a positively charged nucleus at the center

• Electrons revolve in circular orbits

• Electrons are embedded in a sphere of positive charge

Moseley's experiment established that

• Atomic mass is the basis of periodic classification

• Atomic number is the fundamental property of elements

• Neutrons exist inside nucleus

• Energy levels are quantized

The discrete lines in hydrogen spectrum are explained by

• Bohr's model

• Thomson's model

• Dalton's theory

• Rutherford's model

Black-body radiation was explained by

• Einstein

• Planck

• Rutherford

• Bohr

According to Planck's quantum theory, energy is emitted in the form of

• Continuous waves

• Small packets called quanta

• Alpha particles

• Electrons

The Franck-Hertz experiment provided evidence for

• Continuous energy levels in atoms

• Quantized energy levels in atoms

• Wave nature of electron

• Dual nature of light

The Balmer series of hydrogen spectrum lies in the

• Infrared region

• Visible region

• Ultraviolet region

• X-ray region

The photoelectric effect was explained by

• Rutherford

• Planck

• Einstein

• Bohr

In photoelectric effect, electrons are emitted when

• Heat is supplied

• Light of suitable frequency falls on a metal

• A magnetic field is applied

• Metal is cooled