Exam 2: Chemical Basis of Life

The type of chemical bond formed when ions with opposite electrical charges are attracted to one another is called ________.

Chemistry is the branch of science that deals with the composition of matter.

A ________ formula shows how atoms are joined and arranged in various molecules.

The atomic ________ of an atom of an element equals the number of protons and neutrons in its nucleus.

Organic substances always contain the elements hydrogen and ________.

A substance that releases hydrogen ions in water is a base.

An atom that has gained or lost electrons is called an ion.

Atoms that lose or gain electrons become electrically charged particles called __________.

A chemical reaction in which pairs of two different molecules trade positions is called a(an)________ reaction.

When atoms of different elements bond,they form molecules called ________.

If two pairs of electrons are shared,the resulting bond is called a double covalent bond.

As a group,compounds that release ions when they dissolve in water are called

Neutrons are located in the _________ of an atom and they have a "charge" that is ________.

All matter is composed of atoms of fundamental substances called ________.

Chemicals that resist changes in pH are called

The parts of an atom that lack an electrical charge are called ________.

Matter is anything that has weight and takes up space.

________ are lipids used primarily to store energy for cellular activities.

X + Y --> XY is an example of a ________ reaction.

Cholesterol is a protein.