6th Grade Ch 9 , Lesson 1 Test

Thomson's atomic model stated that an atom is positively charge ________ with electrons throughout it.

• circle
• bubble
• sphere

An _________ is the smallest piece of an element that still represents that element.

• Cell
• Atom
• Matter

Many ancient Greek philosophers thought that all matter was made of only 4 elements - Fire, Water, Air, and _______.

• Earth
• Land
• Wind

These early scientists were not able to _______ their theories.

• Experiment
• Test
• Try

An electron cloud is mostly _____________ space.

• Empty
• Outer
• Quiet

In the nucleus is the _________, which is an atomic particle with one positive charge.

• Proton
• Neutron
• Nucleus

Chadwick discovered the _________, a neutral particle that exists in the nucleus of an atom.

• Neutron
• Nucleus
• Electron

Democritus proposed that matter is made of small, indivisible objects called _________.

• Cells
• Molecules
• Atoms

Thomson discovered that the rays in a ______________ were attracted to positively charged plates, which means that the rays have a negative charge.

• Cathode-Ray Tube
• Cathode Tube Ray
• Ray Tube

Rutherford's student performed an experiment during which they shot alpha particles into a piece of _______ foil.

• Gold
• Silver
• Aluminum