Atom Quiz Review

_______________________ explained that an atom has a positively charged center and negatively charged electrons are randomly placed around the center.

• JJ Thomson

• Rutherford

• Dalton

• Bohr

_______________________ said electrons can be found in electron clouds.

• Dalton

• Bohr

• Schrodinger (Modern Theory)

• Thomson

1. _______________________ created a model of an atom that is only made up of negatively charged particles that float around in the atom.  This model was called the Plum Pudding Model.

• Bohr

• Rutherford

• Democtritus

• JJ Thomson

_______________________ & ______________________ believed the atom was a small, hard particle.

• Democritus and Dalton

• Thomson and Rutherford

• Dalton and Bohr

• Rutherford and Democrictus

______________________ said electrons travel in a definite path.

• Dalton

• Bohr

• Thomson

• Rutherford

Where is most of the mass of an atom?

• Proton

• Neutron

• Electron

• Nucleus

A ________________ has a positive charge.

• Proton

• Neutron

• Electron

• Nucleus

A ____________ has a negative charge.

• Proton

• Neutron

• Electron

• Nucleus

A _________________ has a neutral charge.

• Proton

• Neutron

• Electron

• Nucleus

The ______________________ is the smallest particle into which an element can be divided.

• quarks

• isotope

• electron cloud

• atom