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

65 Cu2+










+ 1



2.  fill-in the table.  [10 points]

Chemical name

Chemical formula



Barium nitrate



P3 Cl8

Ammonium sulfate



S4 Br6

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.  Ag3 PO4

b.  CH3 (CH2 )3 CH3