23-24 Semester Exam 1 Review

Front

What happens to the number of valence electrons as you move from group 1 to group 18 in the periodic table?

Back

The number of valence electrons increases.

Front

What is a solution called when it contains more solute than it can normally hold at a given temperature?

Back

Supersaturated solution.

Front

What is the formula for calculating density?

Back

Density = Mass ÷ Volume.

Front

What is the temperature called at which a liquid turns into a gas?

Back

Vaporization Point.

Front

Is this a correct dot diagram for oxygen (O)?

Back

False. Oxygen has 6 valence electrons, so its dot diagram should show 6 dots.

Front

What is the definition of a saturated solution?

Back

A saturated solution is one that contains the maximum amount of solute that can dissolve at a given temperature.

Front

What is the freezing point of water in degrees Celsius?

Back

0°C.

Front

What is the boiling point of water in degrees Celsius?

Back

100°C.

Front

What is the difference between evaporation and boiling?

Back

Evaporation occurs at the surface of a liquid at any temperature, while boiling occurs throughout the liquid at a specific temperature.

Front

What is the principle of conservation of mass?

Back

In a closed system, mass is neither created nor destroyed during a chemical reaction.