Name:  ______________________________           period: ____        date:  _______

Ch. 3 & 4  atoms & molecules  test                  [30 points]        Honors Chemistry

Academic Honesty:   The answers on this test are my own and I am using only the allowed set of notes as described in the syllabus.  I have not discussed the test questions with anyone before or during the test nor have I seen the test questions prior to the exam.  If you violate any of the preceding items or do not sign, your semester grade is a F.

Signature:  ___________________


1.  fill-in the table.  [10 points]


# protons

# neutrons

# electrons


Atomic mass

32 P3-










- 2



2.  fill-in the table.  [10 points]

Chemical name

Chemical formula




N3 I6


(NH4 )2 S

sodium carbonate


iron (III) phosphate


3.  In the following chemical formulas, identify the name of the atoms in the molecule and the number of each atom in a molecule.  [10 points]

a.  Ca3 (PO4 )2

b.  CH3 (CH2 )4 CH3