Chemical reactions and more

Front

What is the Law of Conservation of Mass?

Back

Mass is never created or destroyed in a chemical reaction.

Front

What is evidence that a chemical reaction has occurred?

Back

Bubbles filled with gas, change of temperature, and change in color are evidence of a chemical reaction. However, powder dissolving in water is not.

Front

What subatomic particle has a negative charge?

Back

Electron.

Front

What is a proton?

Back

A proton is a subatomic particle with a larger mass than an electron and a positive charge.

Front

How can you tell if a chemical equation is balanced?

Back

A chemical equation is balanced if the number of atoms for each element is equal on both the reactant and product sides.

Front

What is a chemical reaction?

Back

A process where reactants are transformed into products, involving the breaking and forming of bonds.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is an example of a physical change?

Back

Melting ice is a physical change, as it does not alter the chemical composition of water.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change, as it produces new substances like ash and smoke.