Is anything that occupies space and has mass

Energy has no mass and does not take up space

When energy is inactive or stored:

__________ results from the movement of charged particles

In the body, chemical energy from food is trapped in the bonds of a high-energy chemical called:

Energy cannot be created or destroyed

All matter is composed of a limited number of substances that cannot be broken down into simpler substances by ordinary chemical methods called:

96 percent of the weight of the human body is made up of four elements. Which of the following is NOT one of these elements?

Atoms are clusters of even smaller components called subatomic particles, which include: (select all that apply)

Protons have a:

Atoms that have gained or lost electrons are called:

Each element is given a number, called its ______________, that is equal to the number of protons its atoms contain

The sum of the masses of all the protons and neutrons contained in the nucleus:

An atom has ten neutrons, twelve protons, and twelve electrons. What is its atomic number?

An atom has nine neutrons, nine protons, and eight electrons. What is its atomic mass number?

Isotopes have the same number of protons and neutrons but vary in the number of electrons they contain

Heavier isotopes of certain atoms are unstable and tend to release energy in order to become more stable; such isotopes are called:

When two or more atoms combine chemically, __________ are formed

The only electrons that are important to bonding behavior are those in the atom’s outermost shell. This shell is called the:

Which kind of bond forms when electrons are completely transferred from one atom to another?

Two oxygen atoms share two pairs of electrons (form double bonds) with each other to form a molecule of oxygen gas (O2). What kind of bond is this?

Decomposition reactions occur when:

Which of the following can increase the rate of a chemical reaction?

A difference between organic and inorganic compounds is absence or presence of which element?

Universal solvent:

All salts are _________ (substances that conduct an electrical current in solution)

Which of the following pHs is acidic?

What property of water prevents rapid changes in body temperature?

Glucose is a:

Sucrose is a combination of which two monosaccharides? (select both)

Which type of fat is present in many margarines and baked products and increases the risk of heart disease by raising “bad” cholesterol?

Cholesterol is a steroid molecule.

The building blocks of proteins are small molecules called:

Role of nucleic acids: