Physical Science Unit 3 Exam Study Guide
I.
Be able to find the number of protons, neutrons, and electrons in a neutral atom, isotope, and ion
A. Find the number of protons, neutrons and electrons in a neutral atom of Mercury
(Hg)
B. Find the number of protons, neutrons and electrons in Magnesium-25
C. Find the number of protons, neutrons and electrons in Au2+
II.
Understand how elements are grouped on the Periodic Table of Elements
A. What element can be found in Group 17 Period 5?
B. What element is found in Group 3A Period 2?
C. What elements have similar properties to Neon (Ne)?
III.
Be able to solve a nuclear reaction equation using alpha, beta, and gamma decay
A. What is the symbol for alpha decay? Beta decay? Gamma decay?
B. What is needed to complete this equation:
239 4
92
2
IV.
Be able to read and answer questions using the electromagnetic spectrum diagram, recognize when light is emitted, and be able to identify what color of light is emitted
A. Is light emitted when an electron moves from an excited state to a ground state?
Or is light emitted when an electron moves from a ground state to an excited state?
B. What color of light is emitted when an electron drops from n = 6 to n = 2?
V.
Understand valence electrons and how to find the number of valence electrons in an atom

A. What is a valence electron?
B. How many valence electrons does Potassium have? Chlorine? Boron?
Aluminum?
VI.
Identify whether a covalent bond is polar or nonpolar
A. Describe the polarity of BF3
B. Describe the polarity of H20
VII.
Be able to identify hydrogen bonds from other polar covalent bonds
A. What molecules need to be bonded to hydrogen for it to be a Hydrogen bond?
VIII.
Know the order of bonds from strongest to weakest
A. Which bond is stronger, Metallic or Dipole-Dipole?
B. Which bond is weakest, Ionic, Covalent, or London Dispersion?
IX.
Know how to draw a lewis dot structure diagram for atoms, ionic compounds, and covalent compounds
A. Draw the Lewis Dot Structure of NF3, NaCl, and Mg
X.
Compare and contrast ionic, covalent, and metallic bonds
A. What are the differences between ionic and covalent bonds?
B. Which are good conductors of heat and electricity?
XI.
Ionic bonds: Be able to go from formula to name and from name to formula
A. When do we use Roman Numerals?
B. What is the formula for Calcium Phosphate?
C. What is the name of KOH?
XII.
Covalent bonds: Be able to go from formula to name and from name to formula
A. When do we use Greek Prefixes? What is the exception?
B. What is the formula for Nitrogen Dioxide? What is the name of N7Cl9?