Semester Exam Review

Front

What is a coefficient in a chemical equation?

Back

A large number in front of a chemical symbol or formula that indicates how many molecules of a substance are present.

Front

What type of energy conversion occurs when a lion eats a zebra and runs?

Back

Chemical energy is converted to mechanical energy.

Front

What are metals characterized by on the periodic table?

Back

Metals are usually located on the left-hand side of the periodic table, are typically solid at room temperature, and are shiny, malleable, and ductile.

Front

What is a subscript in a chemical formula?

Back

A small number to the right of the chemical symbol that indicates how many atoms of an element are present.

Front

What does the law of conservation of mass state?

Back

Matter is neither created nor destroyed; the mass of products equals the mass of reactants.

Front

What is the definition of a nonmetal?

Back

Elements that are typically poor conductors of heat and electricity, often found on the right side of the periodic table.

Front

What is the difference between a coefficient and a subscript in chemistry?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms in a molecule.

Front

What is an example of mechanical energy?

Back

The energy of an object in motion, such as a running lion.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configurations, and recurring chemical properties.

Front

What is an example of a chemical change?

Back

Burning wood, which transforms it into ash and gases.