Chemical Reactions article

The substances at the beginning of a reaction

The substances that result from the reaction

The substances that are always gases

The substances that are always metals

Sodium

Chlorine

Sodium chloride

Sugar

True

False

Because sodium chloride is a stable compound, while sodium and chlorine are highly reactive and dangerous.

Because sodium chloride tastes sweet, while sodium and chlorine taste bitter.

Because sodium chloride is a gas, while sodium and chlorine are solids.

Because sodium chloride is radioactive, while sodium and chlorine are not.

Models can be used to show the rearrangement of atoms and to illustrate energy changes in chemical reactions.

Models can be used to predict weather patterns and to calculate population growth.

Models can be used to measure physical fitness and to track financial investments.

Models can be used to design computer programs and to create musical compositions.

Glucose and oxygen

Water and carbon dioxide

Water and glucose

Carbon dioxide and oxygen

the total mass of reactants equals the total mass of products.

energy is created during photosynthesis.

mass is lost as oxygen is released.

carbon dioxide disappears completely.