If atoms of different elements combine, the molecule is called a ________.

A molecular formula represents the numbers and types of atoms in a ________.

How many hydrogen atoms are present in a molecule of glucose (C6H12O6)?

Water (H2O) contains how many oxygen atoms?

Structural formulas can be used to illustrate how atoms are joined and arranged in molecules.

Each atom forms a specific number of covalent bonds, based on the number of electrons it contains in its outermost shell. H atoms form single bonds.

What do three-dimensional molecular models show?

What is the molecular formula for the molecule with the structural formula H—O—H?

What is the molecular formula for the molecule with the structural formula O=C=O?

A ________ occurs as bonds are formed or broken between atoms, ions, or molecules.

Substances that are changed by the reaction are called the ________; those formed are the ________.

During ________ (such as those used in growth and repair), two or more atoms or molecules bond together, forming a more complex product.

What is the general formula for a synthesis reaction?

During decomposition reactions, larger molecules (such as food molecules) are broken into ______ molecules, by breaking chemical bonds.

Which of the following represents the general equation for a decomposition reaction?

Exchange reactions occur as parts of molecules switch places, by breaking chemical bonds and forming new ones. An example is: AB + CD → ___

Which type of reaction is symbolized by using double arrows and allows the products to change back into the reactants?

Substances that release ions in water are called _________.

What happens when ionically bound substances are put into water?

When NaCl dissolves in water, it separates into ______ and ______ ions.

Electrolytes that release hydrogen ions in water are called _______.

Electrolytes that release ions that combine with hydrogen ions in water are called _______.

The concentrations of H+ and OH- in the body are very important to physiology, since they affect chemical reactions that control many _______ functions.

What does pH (potential hydrogenation) represent?

What does the pH scale measure?

A pH of 7 indicates a ______ solution with equal numbers of hydrogen ions and hydroxide (OH-) ions.

A pH in the range of 0 to <7 indicates the presence of more hydrogen ions than hydroxide ions and is considered ______. The lower the pH, the more ______ the solution.

A pH in the range of >7 to 14 indicates the presence of more hydroxide ions than hydrogen ions and is considered:

Between each whole number on the pH scale there is a tenfold difference in hydrogen ion concentration. A solution with a pH of 3 contains ten times more H+ ions than a solution of pH of ____.

Buffers are chemicals that ____ pH change.

What is the normal pH range of human blood?

A pH below 7.35 is a condition called _____

A pH above 7.45 is a condition called _____