Chemistry Quiz 02 (Ch 1)

The study of the composition, structure, and properties of matter; the processes that matter undergoes; and the energy changes that accompany those processes best describes the science of

• biology.

• physics.

• astronomy.

• chemistry.

The branch of chemistry that involves the study of substances and processes occurring in living things is called

• biochemistry.

• organic chemistry.

• physical chemistry.

• theoretical chemistry.

The definition of a chemical is

• a toxic substance made in a laboratory.

• an unnatural material added to foods.

• any substance that has a definite composition.

• anything that has mass and takes up space.

The fundamental building block of matter is the

• atom.

• molecule.

• cell.

• proton.

A change in a substance that does not involve a change in the identity of the substance is called a(n)

• chemical change.

• physical change.

• extensive property.

• intensive property.

In every chemical change, two or more reactants form at least one

• product.

• gas.

• precipitate.

• reaction.

If a mixture is uniform in composition, it is considered to be

• heterogeneous.

• molecular.

• homogeneous.

• elemental.

All known elements are organized into a chart known as the

• element table.

• group table.

• periodic table.

• metal-nonmetal table.

The vertical columns of the periodic table are called

• periods.

• rows.

• groups.

• chemicals.

Which of these describes noble gases?

• massless

• unreactive

• good heat conductors

• good electrical conductors