Ch 4 Atom History, Avg Atomic Mass, etc. Study Set 2

Who was the first person to study atomic theory?

• Dalton
• Democritus
• Chadwick
• Miller

True or False? John Dalton believed that moving electrons exist in electron clouds around the nucleus. 

• False
• True 

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

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

Who proposed the idea that electrons are not fixed but constantly move?

• Dalton
• Bohr
• Schrodinger
• Chadwick

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

Which model suggested that: Atoms mostly consist of positively charged material with negatively charged particles (electrons) located throughout the positive material.

• Bohrs Model
• Plum Pudding Model 
• Democritus Model
• Our current model 

Tags

NGSS.MS-PS1-1

Believed that atoms are small, hard particles that were "indivisible"

• Democritus
• Aristotle
• Schrodinger
• Greek Philosophers

Discovered that the atom has a small, dense, positively charged nucleus.

• Ernest Rutherford
• Heisenberg
• Democritus
• JJ Thomson

Tags

NGSS.HS-PS1-8

Believed that all atoms of the same element would be the same.

• John Dalton
• JJ Thomson
• Niels Bohr
• Modern Atomic Theory

Tags

NGSS.MS-PS1-1