Download Accuracy and Measurements:

UNIT 1 EXAM REVIEW
Accuracy and Measurements:
1. What are the steps in the scientific method? What does a scientist do during
each of these steps?
2. What is the difference between an independent variable and a dependant
variable?
3. What are the units used to measure volume and mass?
Chapter 17: Atoms and the Periodic Table:
Understand and describe the following:
Model
Electron Shell
Valence Electrons
Using a periodic Table, fill in the following information:
Element Name
Element Symbol
Atomic Mass
Atomic Number
11
15
5
54
# of protons
# of Neutrons
# of electrons in a
neutral atom
Group #
# of electron shells
# of valence electrons
Metal, Non-metal,
semi-metal, halogen,
or noble gas
1. What force holds the neutrons and the protons together in the nucleus?
2. Describe an atom’s size and the relative size of the subatomic particles. Also.
Describe how large the nucleus is compared to the size of the entire atom.
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3. Compare and contrast the following: Atom, Molecule, Element
4. Compare and Contrast the following: Neutral atom, isotope, ion
5. What are valence electrons?
6. How many electrons are in the following ions?
a. F -1
b. Ca +2
c. O-2
d. K +1
7. What is an isotope? How do you write the name of an isotope?
8. What are the numbers of protons and neutrons in the following isotopes:
a. Carbon-13
b. Uranium- 235
c. Nitrogen-15
d. Hydrogen-3
9. Why is the atomic mass on the periodic table a decimal?
10. Identify where the following are located on the periodic table:
a. Metals
b. Nonmetals
c. Metalloids
Which one of those above takes up the majority of the periodic table?
11. What are periods? Families?
12. Of periods and families, which share common characteristics?
13. Where are the noble gases located? What’s special about the noble gases and
bonding?
14. The number of electron shells that an atom will have corresponds to the number of
the _________________ that it is in on the periodic table. The number of valence
electrons that an atom will have corresponds to the number of the
________________ that it is in on the periodic table.
Chapter 23: Chemical Bonding:
1. Compare ionic and covalent bonding using the chart below.
Types of
Elements
Electrons
Misc Info (anything else
important?)
Covalent
Ionic
2. What are three characteristics of an ionic bond?
3. What are the rules for naming ionic bonds?
4. What is the difference between a cation and an anion, and what types of
elements form both?
5. What is the balanced chemical formula for the ionic bond that would form
between calcium and sulfur?
6. NaCl is an example of a salt, formed through an ionic bond. Explain how the two
different elements that create this compound bond together and why?
7. What are three characteristics of covalent bonds?
8. How do covalent bonds differ from ionic bonds?
9. What are the rules for naming covalent bonds?
Practice with bonds
1. If an atom loses an e-, it has a __________________________ charge. Why is
this?
2. What charge(s) do each of the following elements have? Explain.
a. Iron
b. oxygen
c. sulfur
d. aluminum
3. What is the chemical formula for calcium bromide? Sodium nitride? Aluminum
Oxide? How are chemical formulas determined?
4.
Why do chemical bonds form?
5. Oxidation number is the same as the __________________ of an ion
Properties of Matter
1. What is a chemical change? Give an example.
2. What is a physical change? Give an example
3. What is a chemical property? Physical property? What’s an example of each?
4. Describe two ways you can determine whether or not something has gone through
a physical or chemical change.