Physical Science Final (60%)

Front

What is the formula for a compound containing only lithium (Li) and oxygen (O)?

Back

Li2O

Front

Why does the temperature remain the same during the interval from point B to point C on a heating curve for water?

Back

Heat energy is being used to change the water's phase from a solid to a liquid.

Front

What can be concluded about the elemental compositions of ionic compounds?

Back

Ionic compounds contain metallic and nonmetallic elements.

Front

What effect does temperature have on the solubility of sugar in water?

Back

The greater the temperature of the water, the quicker the solute will dissolve.

Front

How does a chlorine atom become a negatively charged ion?

Back

It gains an electron.

Front

What is an ionic compound?

Back

An ionic compound is formed when metal atoms transfer electrons to nonmetal atoms, resulting in charged ions that attract each other.

Front

What is the significance of the heating curve for water?

Back

It illustrates the changes in temperature and phase of water as heat is added.

Front

What happens to the energy during a phase change?

Back

Energy is absorbed or released, but the temperature remains constant during the phase change.

Front

What is the role of temperature in the dissolution of solids in liquids?

Back

Higher temperatures generally increase the rate at which solids dissolve in liquids.

Front

What is the difference between a cation and an anion?

Back

A cation is a positively charged ion, while an anion is a negatively charged ion.