Name:
Section Number
Name of Lab: Lab 2- Atoms and Molecules
Date Completed:
Directions:

Fill in the following fields as completely and accurately as possible. Please be sure to practice appropriate grammar, punctuation,
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When finished, save your document with a file name that includes your name, section number, and the assignment (i.e.
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
Email your completed form to the TA, Dande Tucker, at dtucker@msjc.edu before midnight on the day it is due. Late work will not
be accepted.
Part 1 – Determining the Number of Protons and Neutrons
a. Determine the number of protons, neutrons, and electron in each of the following atoms (refer to the
periodic chart to answer these questions):
Helium (He)
Protons=
Neutrons=
Electrons=
Magnesium (Mg)
Protons=
Neutrons=
Electrons=
Silver (Ag)
Protons=
Neutrons=
Electrons=
b. Determine the number of protons, neutrons, and electrons in each of the following ions:
Hydrogen ion (H+)
Magnesium ion (Mg+)
Chlorine ion (Cl-)
Protons=
Neutrons=
Electrons=
Protons=
Neutrons=
Electrons=
Protons=
Neutrons=
Electrons=
Part 2 – Review of Atomic and Molecular Structure
Refer to the periodic chart . Determine the number of protons, neutrons, and electrons on atoms of each of the
following elements. The fist one has been completed for you.
Element
Carbon
Hydrogen
Oxygen
Symbol
C
Protons
6
Na
Mg
15
17
Potassium
Ca
Neutrons
6
Electrons
6
Part 3 – Atoms, Ions and Molecules
Use to the periodic chart to determine the number of protons and electrons that comprise the following atoms,
ions, and molecules. (The number of plus signs (+) indicates how many electrons have been lost and the number of minus
signs (-) indicates the number of electrons gained).
Protons in a sodium atom (Na)
Protons in a sodium ion (Na-)
Electrons in a sodium atom (Na)
Electrons in a sodium ion (Na+)
Protons in a chlorine atom (Cl)
Protons in a chlorine ion (Cl-)
Electrons in a chlorine atom (Cl)
Electrons in a chlorine ion (Cl-)
Protons in a sodium chloride molecule (NaCl)
Protons in a calcium atom (Ca)
Electrons in a sodium chloride molecule (NaCl)
Electrons in a calcium atom (Ca)
Protons in a calcium ion (Ca++)
Protons in a oxygen atom (O)
Electrons in a calcium ion (Ca++)
Electrons in a oxygen atom (O)
Protons in an oxide ion (O- - )
Protons in a calcium oxide molecule (CaO)
Electrons in a oxide ion (O- -)
Electrons in a calcium oxide molecule (CaO)
Part 4- Testing the pH of Common Solutions
Solution
EX: bleach
1.
2.
3.
4.
5.
Take a Guess—Acidic, Basic or
Neutral?
Acidic
Actual pH using pH strips:
pH 12