Exam 2: Chemical Basis of Life

The chemical behavior of atoms results from interactions among their _________.

If solution A has a pH of 6 and solution B has a pH of 3,then ________.

The opposite of a decomposition reaction is called a ________ reaction.

When atoms form bonds by sharing electrons,the bond formed is a type of ________ bond.

Certain cellular organelles use oxygen to release energy from glucose.

Atoms of different elements vary in size,weight and ways they interact with atoms or different elements.

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

Protons are the subatomic particles that determine an atom's bonding behavior.

Collectively,these bonds are responsible for the surface tension of water,but individually they are weak bonds.

Buffers combine with hydrogen ions when H⁺ is in excess or they donate hydroxide ions when H⁺ is depleted.

Proteins include DNA and RNA.

Water,salts,oxygen and proteins are all examples of inorganic substances.

Which of the following chemicals is NOT an inorganic substance?

An ________ is defined as a substance that ionizes in water.

Which elements make up 95% (by weight)of the human body?

A solution that contains more hydrogen ions than hydroxide ions is _________.

The atomic weight of an atom of an element equals the number of neutrons in its nucleus.

________ are the building blocks of nucleic acids.

Which of the following substances is NOT an element?

________ are chemicals that resist pH changes.