PS8 11.1 QUIZ

A _______________ is a particle with a negative electric charge.

• Proton
• Neutron
• Electron
• Nucleus

The _____________ is where most of an atom's mass is located.

• Proton
• Neutron
• Electron
• Nucleus

Which of the following scientists discovered that atoms contain electrons?

• Dalton
• Thomson
• Rutherford
• Bohr

What did dalton do in developing his theory that Democritus did not do? (Think about the difference between a philosopher and a scientist)

What discovery demonstrated that atoms are mostly empty space?

Compare the location of electrons in Bohr's theory with the location of electrons in the current atomic theory.