Unit 2 Quick Review

This model was developed by

• Rutherford

• Bohr

• Thomson

• Dalton

This model was developed by

• Rutherford

• Bohr

• Thomson

• Dalton

This model was developed by

• Rutherford

• Bohr

• Thomson

• Dalton

This model was developed by

• Rutherford

• Bohr

• Thomson

• Dalton

This reflects whose experiment?

• Rutherford

• Bohr

• Thomson

• Dalton

This reflects whose experiment?

• Rutherford

• Bohr

• Thomson

• Dalton

When John Dalton published his atomic theory, he postulated that all elements are composed of tiny indivisible particles called atoms. A weakness of this theory is that it fails to recognize that atoms

• are indestructible.

• react with other atoms.

• combine in whole number ratios.

• contain protons, neutrons and electrons.

Which of the following statements is NOT part of Thomson’s model of the atom?

• The positive charge is distributed throughout the atom.

• The mass of the atom is distributed evenly throughout.

• There is a nucleus which contains most of the atom’s mass.

• Negative particles are distributed throughout the atom. 

All atoms of a given element have the same __________.

• mass.

• number of protons.

• number of neutrons.

• number of electrons.

• density.

In the symbol, X is _________.

• N

• C

• K

• Al

• What is this?