Chapter 19 Chemical Reactions

Front

What is a chemical reaction?

Back

A process in which one or more substances are converted into new substances with different properties.

Front

What is the law of conservation of mass?

Back

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

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product?

Back

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

Front

What is an ion?

Back

An atom or molecule that has gained or lost one or more of its valence electrons, resulting in a positive or negative charge.

Front

What is a balanced chemical equation?

Back

An equation that has the same number of each type of atom on both sides, indicating that mass is conserved.

Front

What is a coefficient in a chemical equation?

Back

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

Front

What happens during the rusting of metal?

Back

It is a chemical reaction where iron reacts with oxygen and moisture to form iron oxide, a different chemical substance.

Front

What is a covalent bond?

Back

A type of chemical bond where two atoms share one or more pairs of electrons.

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements and numbers to indicate the ratio of atoms.