Ch.1 Introduction to Matter

Front

What holds atoms together in a molecule?

Back

Chemical bonds are the forces that hold atoms together in a molecule.

Front

Anything that has mass and takes up space is called?

Back

Matter is defined as anything that has mass and occupies space.

Front

A(n) __________ is a group of two or more atoms that are held together by chemical bonds.

Back

A molecule is a group of two or more atoms bonded together.

Front

To find the mass of a rectangular object, you multiply the object's length, width, and height. True or False?

Back

False. To find the mass, you need to use a scale, not dimensions.

Front

A substance is a single kind of matter that has a specific composition. True or False?

Back

True. A substance has a definite composition and distinct properties.

Front

What is the smallest unit of an element that retains the properties of that element?

Back

An atom is the smallest unit of an element that retains its chemical properties.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

What is the difference between a homogeneous and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition, while a heterogeneous mixture has distinct, separate components.

Front

What is the term for a change in matter that does not alter its chemical composition?

Back

A physical change is a change that affects one or more physical properties but does not change the substance's chemical composition.

Front

What is the term for a change in matter that results in the formation of new substances?

Back

A chemical change is a process that leads to the transformation of one substance into another.