Chemical reactions and more

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into new substances (products) with different properties.

Front

What does it mean for a chemical equation to be balanced?

Back

It means that the number of atoms for each element is the same on both the reactant and product sides.

Front

What are some signs that a chemical reaction has occurred?

Back

Signs include color change, temperature change, gas production (bubbles), and formation of a precipitate.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not.

Front

What is an example of a physical change?

Back

Melting ice is a physical change because it changes state but remains water.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change because it produces ash and smoke, which are new substances.

Front

What are the three subatomic particles?

Back

Protons, neutrons, and electrons.

Front

Where are protons located in an atom?

Back

Protons are located in the nucleus of an atom.

Front

What charge do electrons have?

Back

Electrons have a negative charge.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus and do not have a charge.