PS.2 Atomic Theory

Which scientist saw the atom as mostly empty space with electrons orbiting around the nucleus?

• 
  Ernest Rutherford

• J.J. Thomson

• Niels Bohr

• 
  John Dalton

Which scientist explained that atoms were too small to see, and that atoms of different elements had different masses?

• Niels Bohr

• John Dalton

• Ernest Rutherford

• 
  J.J. Thomson

Which scientist proposed a model of the atom in which the individual atoms where thought of as tiny solids like balls or marbles?

• Ernest Rutherford

• 
  James Chadwick

• John Dalton

• J.J. Thomson

Tags

NGSS.MS-PS1-1

Which scientist saw the atom as a solid sphere?

• Ernest Rutherford

• Niels Bohr

• 
  John Dalton

• J.J. Thomson

There are two types of particles found in the nucleus of most atoms. The proton is one, what is the second particle?

• 
  Vacuole

• Mitochondria

• 
  Neutron

• Electron

Tags

NGSS.MS-PS1-1

The British school teacher credited with proposing the first atomic theory was —

• Niels Bohr

• 
  J.J. Thomson

• 
  John Dalton

• Ernest Rutherford

Where is most of the mass of an atom located?

• 
  In the electron

• Electron cloud

• In the nucleus

• Evenly spread throughout the atom

What type of charge does a neutron have?

• negative 

• positive 

• neutral 

• static 

The electron has a —

• 
  negative charge

• 
  neutral charge

• positive charge

• 
  static charge

Tags

NGSS.MS-PS2-3

The positively charged particle in the center of an atom is called the —

• neutron

• electron

• proton

• quark

Tags

NGSS.MS-PS1-1