3 early laws, 3 experiments, Dalton, Democritus

Democritus AND Dalton did NOT believe that

• atoms are indivisible and indestructible

• all matter is made of atoms

• changes in matter are due to changes in groupings of atoms

• the nucleus is in the center of an atom

Dalton believed that

• atoms are indivisible and indestructible

• all matter is made of atoms

• changes in matter are due to changes in groupings of atoms

• all of these

Which experiment led to the discovery of the charge to mass ratio on the electron?

• gold foil

• cathode ray tube

• oil drop

Who did the oil drop experiment?

• Millikan

• Thomson

• Rutherford

• Dalton

In the cathode ray experiment, because the ray is deflected by a magnetic field, then the particles in the ray must be

• charged

• nucleus

• small

• droplets

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which model of the atom was created directly after the cathode ray tube experiment?

• plum pudding

• quantum mechanical model

• atomic model

• bohr model

Who, in 1897, discovered the electron?

• Dalton

• Rutherford

• Bohr

• Thompson

Which of the four Physicists was first to work with cathode rays?

• o Dalton

• o Thomson

• o Rutherford

• o Bohr

Who performed the famous 'gold foil experiment'?

• o Dalton

• o Thomson

• o Rutherford

• o Bohr

Rutherford’s gold foil scattering experiment indicated that 

• the nucleus of an atom occupies most of an atom’s volume
• positive charges are dispersed throughout the atom.
• positive charges are concentrated in a very small core at the atom’s center
• protons and neutrons are located in the nucleus.