Chemical Formulas and Reactions

Front

What is the term for one or two letters used to represent an element?

Back

Symbol(s)

Front

What does the arrow symbol in a chemical equation represent?

Back

It shows that a reaction has taken place, often referred to as 'yields'.

Front

What is a sign of a chemical change?

Back

Unexpected color change.

Front

How can you tell a chemical reaction has occurred when baking?

Back

The ingredients cannot be returned to their original state.

Front

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

Back

Chemical changes produce a new substance, while physical changes do not change the substance itself.

Front

What is the definition of a reactant in a chemical reaction?

Back

A substance that is present at the start of a chemical reaction.

Front

What is a product in a chemical reaction?

Back

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

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction.

Front

What does the term 'atomic number' refer to?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is meant by 'atomic mass'?

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).