Discovery of the Atom

What was the first discovered part of the atom?

• Electron

• Proton

• Neutron

• quark

Democtrius' theory believed that all matter was made of tiny distinct elements.

• True

• False

The Bohr's model of the atom shows...

• electrons moving in random, straight lines

• electrons moving in circular motions around a nucleus.

• electrons moving throughout the entire atom

Aristotle believed that all matter is made of....

• Fire

• Air

• Water

• Earth

• All of these.

Rutherford and his students discovered which part of the atom?

• The nucleus

• The protons

• the nucleus and proton

• the outer edge of the electrons

Who was the first person to study atomic theory?

• Dalton
• Democritus
• Chadwick
• Miller

Who proposed that the atom consists mostly of empty space?

• Bohr
• Dalton
• Rutherford
• Chadwick

What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?

• Ernest Rutherford, JJ Thomson, John Dalton, & Democritus

• JJ Thomson, John Dalton, Ernest Rutherford, & Democritus

• Democritus, John Dalton, JJ Thomson, Ernest Rutherford.

• John Dalton, JJ Thomson, Democritus, & Ernest Rutherford

What was J. J. Thomson's contribution to the atomic theory?

• Discovered the electron

• Discovered the nucleus -did the gold foil experiment

• Created a model of the atom with electrons moving around the nucleus in fixed orbits

• Discovered the neutron

What was James Chadwicks most notable discovery?

• The nucleus contains protons. 
• The nucleus contains neutrons.
• Electron are not fixed.
• Protons are positive.

Tags

NGSS.HS-PS1-8