Exam 2: Chemical Basis of Life

An element with an atomic number of 6 contains 12 protons.

________ is defined as anything that has weight and takes up space.

As the concentration of hydrogen ions increases,a solution's pH decreases.

Water is an example of a compound.

The pH scale ranges from 0 to 14.

A salt is a compound composed of oppositely charged ions.

A decomposition reaction can be symbolized as ________.

Atoms that gain or lose electrons become electrically charged and are called ________.

An acid is defined as an electrolyte that releases hydroxide ions (OH^-)in water.

Carbon dioxide is

________ is the most abundant compound in living material.

Each element is composed of characteristic tiny particles called ________.

Understanding ________ is essential for understanding anatomy and physiology because body structures and functions result from chemical changes.

The attraction of the positive hydrogen end of a polar molecule to the negative nitrogen or oxygen end of another polar molecule is called a(an)

The molecular formula for compounds like sodium chloride (NaCl)give the relative amounts of each element present.

The branch of science that deals with the composition of matter is ________.

A ________ reaction is symbolized as A+B→AB.

The electrons in the outermost shell of an atom determine its

At the cellular level of organization,biology becomes the study of

In a water molecule,shared electrons spend more time at the oxygen pole than the hydrogen pole,an example of ________ bonds.