Atomic Theory Timeline Exit Ticket

Who discovered the electron?

• Dalton

• Thomson

• Rutherford

• Bohr

What did Rutherford discover in his experiment?

• nucleus

• electrons

• neutrons

Tags

NGSS.HS-PS1-8

Who proposed a model with electrons moving in specific layers - energy levels?

• Dalton

• Thomson

• Rutherford

• Bohr

Which of the following statements about the moden cloud model of the atom is TRUE?

• Electrons clouds are formed by electron movement.

• Only protons form the nucleus.

• Protons and electrons form the nucleus

• Neutrons in the nucleus have a positive charge.

Tags

NGSS.HS-PS1-8

Rutherford's 'gold-foil' experiment using alpha particle scattering concluded that

• the center of the atom is empty

• atomic mass is spread over the whole atom

• the center of the atom has a negative charge

• most of the atom is empty

In which model are atoms are imagined as the solar system?

• Dalton

• Thomson

• Rutherford

• Bohr

• Cloud Model

Which scientist(s) came up with each model of the atom?

• Modern Cloud Theory

• 
• Ernest Rutherford

• 
• John Dalton

• 
• JJ Thomson

• 
• Neils Bohr

• 

Democritus claimed that matter was made of small, hard particles that he called “atomos”.

The word atom comes from a Greek word "atomos" that means______.

• Invisible

• Indivisible

• Undivided