Chemical Formulas and Reactions

Front

What is a compound?

Back

A compound is a substance composed of two or more elements chemically combined in a definite proportion.

Front

What does the arrow symbol in a chemical equation represent?

Back

The arrow symbol indicates that a reaction has taken place, often referred to as 'yields'.

Front

What is a sign of a chemical change?

Back

An unexpected color change is a sign of a chemical change.

Front

How many iron and oxygen atoms are in Fe2O3?

Back

Fe2O3 has 2 iron atoms and 3 oxygen atoms.

Front

What occurs during a chemical reaction?

Back

During a chemical reaction, substances interact to form one or more new substances with different properties than the original substances.

Front

Define reactant.

Back

A reactant is a substance that undergoes a change in a chemical reaction.

Front

Define product.

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What is a physical change?

Back

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

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or atoms of that substance are involved in the reaction.