3.1-3.3

The theory that matter was made from small indivisible particles called ________.

• atoms

• molecules

• elements

• ions

In faraday’s experiment, when two metal plates called ________.

• covalent

• electrodes

• ionic

• molecular

The solution breaks up into charged particles called ________.

• protons

• electron

• ions

• elements

Air or gases normally do not conduct electricity, unless a very ________ voltage is applied.

• low

• medium

• molecular

• high

When the pressure inside the tube is lowered to about ________ m.m of Hg, the glow disappears and the walls of the glass tube begin to glow with a brilliant green light.

• 0.0001

• 0.001

• 0.01

• 0.1

At sufficient ________ gas pressures, the glass wall opposite the cathode glows.

• high

• low

• medium

• molecular

________ rays travel in straight line.

• anode

• cathode

• anion

• cation

________ rays produce sharp shadows of objects placed in their path.

• anion

• cation

• cathode

• anode

________ rays emerge normally from the cathode.

• cation

• anion

• cathode

• anode

________ rays can be focused by using a concave cathode.

• anode

• cation

• anion

• cathode