History of Atomic Theory

The video explores the history of atomic theory, starting with Democritus's philosophical idea of indivisible particles called atomos. John Dalton provided the first empirical evidence of atoms, explaining chemical reactions and compound formation. JJ Thompson discovered the electron, leading to the plum pudding model. Ernest Rutherford's gold foil experiment revealed the nuclear structure of the atom, showing that atoms are mostly empty space with a dense nucleus.

Who was the first to propose the idea of indivisible particles called 'atomos'?

• John Dalton

• JJ Thompson

• Democritus

• Ernest Rutherford

What did John Dalton's atomic theory help explain about water?

• Water can be split into carbon and oxygen

• Water has a fixed ratio of hydrogen to oxygen by mass

• Water is made of hydrogen and nitrogen

• Water is composed of indivisible particles

What did JJ Thompson discover through his cathode ray experiment?

• The nucleus

• The proton

• The neutron

• The electron

What model did JJ Thompson propose for the atom?

• Solar system model

• Plum pudding model

• Bohr model

• Quantum model

What did Rutherford's gold foil experiment reveal about the structure of the atom?

• Atoms have a dense nucleus and are mostly empty space

• Atoms are solid and dense

• Atoms have no internal structure

• Atoms are made of indivisible particles