Unit 2 Hindenburg Test Review

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) through breaking and forming chemical bonds.

Front

What are reactants in a chemical equation?

Back

The starting substances that undergo a chemical change.

Front

What are products in a chemical equation?

Back

The substances that are formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom, with no charge.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.