Grade 9 Unit B Section 2 Review Quiz

Which greek philosopher said the elements are various combinations of air, earth, fire and water?

• Democritus

• Aristotle

• Berzelius

• Pythagoras

Who developed the "electron shell" model of the atom?

• Rutherford

• Dalton

• Bohr

• Thomson

The (a)   is a positively charged sub atomic particle

The (a)   is a negatively charged particle that orbits the atom.

The (a)   is 1/10 000th the size of the atom and composed of protons and neutrons

An element's (a)   tells us how many protons that element has.

An element's (a)   tells us the average mass of an atom of that element.

A substance that is conductive, shiny, malleable, ductile, and a solid at room temperature is likely classified as a...

• metal

• metalloid

• nonmetal

• none of the above

A reactive nonmetal likely belongs to which group on the periodic table?

• Alkali Metals

• Alkaline Earth Metals

• Halogens

• Noble Gases

True or False. Elements on the periodic table become more reactive as we move from left to right on the periodic table.

• True

• False