5.1 Developing Models of Matter

What is the smallest part of an element that has all of the element's properties?

• proton

• atom
• neutron

• electron

Which subatomic particles are found in the nucleus?

• proton

• neutron

• electron

Which subatomic particles has a positive charge?

• proton

• neutron

• electron

Which subatomic particles has a negative charge?

• proton

• neutron

• electron

Which subatomic particles has no charge?

• proton

• neutron

• electron

Which subatomic particle is found in the energy levels surrounding the nucleus?

• proton

• neutron

• electron

Who was among the first to suggest the existence of atoms?

• Rutherford

• Democritus
• Dalton

• Bohr

Which scientist discovered that atoms are composed of smaller particles using cathode ray tubes?

• J.J. Thomson
• Niels Bohr

• Ernest Rutherford

• John Dalton

Which model does not specify an exact path for the electron to take around the nucleus?

• Billiard Ball Model

• Bohr Model

• Quantum Mechanical Model

• Plum Pudding Model

Which model includes an electron cloud?

• Billiard Ball Model

• Bohr Model

• Quantum Mechanical Model

• Plum Pudding Model