Chemistry Review 2024

Front

What is evidence of a chemical reaction?

Back

Evidence of a chemical reaction includes changes such as color change, gas production, or formation of a precipitate. An example is burned sugar turning brown then black.

Front

What is the definition of 'products' in a chemical reaction?

Back

Products are the substances produced in a chemical reaction.

Front

Why is graphite soft?

Back

Graphite is soft because its atoms are arranged in a layered structure, allowing them to slide over each other easily.

Front

What are mixtures?

Back

Mixtures are different materials placed together but NOT chemically bonded.

Front

How are elements and compounds related?

Back

Elements are pure substances made of one type of atom, while compounds are made of at least two types of atoms bonded together.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where substances (reactants) are transformed into new substances (products) through the breaking and forming of bonds.

Front

What is the definition of 'reactants'?

Back

Reactants are the starting substances in a chemical reaction that undergo change.

Front

What is the difference between a compound and a mixture?

Back

A compound consists of two or more elements chemically bonded together, while a mixture consists of two or more substances that are not chemically bonded.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting to water.

Front

What is a chemical change?

Back

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