Chapter 4 Test

Who proposed the first atomic view of matter?

• Lavoisier
• Empedocles
• Democritus
• Priestley

Who started the modern atomic theory (backed with data) of the atom?

• Democritus

• Dalton

• Thomson

• Bohr

What type of particles exist within an atomic nucleus?

• Protons and Neutrons
• Neutrons and electrons
• Neutrons and Atoms
• Elements and Atoms

Oxygen has an atomic number of 8. What can you conclude?

• An atom of oxygen weighs 8 atoms
• An atom of oxygen has 4 protons and 4 electrons
• An atoms of oxygen has 8 postitrons
• An atom of oxygen has 8 protons

How many protons are in the element, "Sodium?"

• 23
• 11
• 13
• 14

All atoms of the same element have the same?

• number of neutrons
• number of protons
• mass number
• all of these

Which of the following is NOT a part of Dalton's atomic theory?

• All matter is composed of atoms and empty space

• Atoms are always in motion.

• Atoms of the same element are identical.

• Atoms can't be destroyed...merely re-arranged.

Democritus AND Dalton did NOT believe that

• atoms are indivisible and indestructible

• all matter is made of atoms

• changes in matter are due to the arrangement of atoms

• the nucleus is in the center of an atom

JJ Thomson discovered what subatomic particle

• nucleus

• neutron

• proton

• electron

Rutherford discovered what part of the atom

• nucleus

• neutron

• proton

• electron