The Atom

Who's model of the atom was the first to include electrons

• Dalton's

• Rutherford's

• Thomson's

• Bohr's

Which scientist discovered the nucleus

• Dalton

• Thomson

• Bohr

• Rutherford

The ............. foil experiment was used to discover the nucleus.

Bohr used quantum mechanics to discover which part of his model

• The elctron

• The nucleus

• That electrons orbit in set energy levels

• That the nucleus contains protons and neutrons

The unit used to measure the mass of an atom is

• the atomic mass unit

• the atomic unit

• the mass unit

• the tiny mass unit

The letter used to represent the atomic mass unit is ....

The proton

• orbits the nucleus

• is found in the nucleus

• has zero charge

• has a negative charge

• has a positive charge

The electron

• Is the largets subatomic particle

• has a negative charge

• has a positive charge

• is the smallest subatomic particle

• orbits the nucleus

The atomic number tells us the number of ............ in an atom

The number of neutrons in a nucleus is

• atomic number

• the atomic number - the mass number

• the mass number

• the mass number - the atomic number