Atomic Theory

The atom is mostly large empty space with a small, dense nucleus at the center

• Dalton

• Thomson

• Rutherford

• Bohr

Atom is a positively charged cloud with embedded negative electrons

• Dalton

• Thomson

• Rutherford

• Bohr

Atoms are indivisible (cannot be broken down)

• Dalton

• Thomson

• Rutherford

• Bohr

What scientist proposed this atomic model?

• Dalton

• Thomson

• Rutherford

• Bohr

What scientist proposed this atomic model?

• Dalton

• Thomson

• Rutherford

• Bohr

What scientist proposed this atomic model?

• Dalton

• Thomson

• Rutherford

• Bohr

In a famous experiment conducted by Ernest Rutherford, positively charged alpha particles were scattered by a thin gold foil. Which of the following is a conclusion that resulted from this experiment?

• The nucleus is negatively charged

• The atom is a dense solid and is indivisible

• The mass is conserved when atoms react chemically

• The nucleus is very small and the atom is mostly empty space

What subatomic particle was discovered in the cathode ray tube experiment?

• Proton

• Neutron

• Electron

• Nucleus

Which scientist developed the atomic theory?

• JJ Thomson
• Ernest Rutherford
• John Dalton
• James Chadwick

He developed the planetary model of the atom.

• Rutherford
• Bohr
• Chadwick
• Dalton