Atomic Models - Thomson and Rutherford

The video tutorial explores the evolution of atomic models, starting with the billiard ball model and J.J. Thomson's plum pudding model, which introduced the concept of electrons within a positively charged sphere. It then discusses Rutherford's gold foil experiment, which led to the discovery of the nucleus and the proposal of a new atomic model where electrons orbit a central nucleus. The video also covers the concepts of atomic number, mass number, isotopes, and isobars, highlighting the limitations of Rutherford's model in explaining atomic spectra.

What did J.J. Thomson's model of the atom resemble?

• A crystal lattice

• A cloud

• A plum pudding

• A solar system

What was the key observation from Rutherford's gold foil experiment?

• All alpha particles were deflected

• Alpha particles created new elements

• Most alpha particles passed through undeflected

• Alpha particles were absorbed by the foil

According to Rutherford's model, what is the nucleus compared to?

• A sun

• A moon

• A star

• A planet

What limitation does Rutherford's model have regarding electron behavior?

• It describes electron mass

• It explains electron arrangement

• It predicts continuous energy loss

• It accounts for atomic spectra

What does the atomic number represent?

• Number of electrons

• Number of protons

• Number of neutrons

• Number of nucleons

What are atoms with the same mass number but different elements called?

• Isotopes

• Ions

• Isobars

• Isomers

What are atoms with the same atomic number but different mass numbers called?

• Isotopes

• Isobars

• Isomers

• Ions