History of the Atom and Atomic Structure

Who was the first person to study atomic theory?

• Dalton
• Democritus
• Chadwick
• Miller

What was the name of J.J Thomsons' model of atomic structure. 

• Electron Cloud Model 
• Electron Sea Model
• Plum Pudding Model 
• Bohr Model

What does the Bohr model suggest?

• Atoms are small, hard, indivisible objects. 
• That protons in the nucleus are attracted to electrons in the electron clouds. 
• That electrons travel around the nucleus of an atom in orbits or definite paths.

Who proposed that the atom consists mostly of empty space?

• Bohr
• Dalton
• Rutherford
• Chadwick

The word 'atomos' termed by Democritus means:

• Indivisible
• Unconscious
• Blue
• Nuclear powered

Developed the “billiard ball” model of the atom

• Niels Bohr
• John Dalton
• J.J. Thomson
• Ernest Rutherford

Discovered the electron

• Bohr
• Dalton
• Rutherford
• Thomson

Which of the following shows the correct order of Atomic Theory Timeline

• Rutherford, Bohr, Dalton, Democritus, Thomson

• Bohr, Democritus, Thomson, Rutherford, Dalton

• Dalton, Thomson, Rutherford, Bohr, Democritus

• Democritus, Dalton, Thomson, Rutherford, Bohr

Which Scientist created this model

• Democritus

• Chadwick

• Bohr

• Rutherford

The positively charged particle in the center of an atom is called the ___.

• proton
• electron
• neutron
• quark