NAME: ______________________________
MIDTERM REVIEW
Period:__________
TOPIC 1: Scientific Method/Metric Conversions – NOTE: there will be a graph on the test
1. List the steps of the Scientific Method
1. Observe/Ask a question 2. Make a Hypothesis
4. Analyze Results 5. Make a Conclusion
3. Perform experiment (data/observations)
2. Matching – Draw a Line between the word and the corresponding definition
hypothesis
organized process used to test a hypothesis
control
an educated guess about the solution to a problem
variable
observations/measurements recorded during an experiment
experiment
a judgment based on the results of an experiment
conclusion
a logical explanation for events that occur in nature
theory
a set-up in an experiment where no factor is changed
data
factor that changes in an experiment
3. CONVERSIONS: REMEMBER – King Henry Drinks Bitter Dark Chocolate Milk
13.24g = _.01324__kg
689cm = ___6890___mm
3.124kg = ___3124000______mg
3.092L = ___3092_______mL
4. What is the difference between qualitative and quantitative observations?
Qualitative: words, use your senses
Quantitative: numbers
5. Using the picture on the right
a. what is the calibration of the thermometer ___1OC____
b. what is the measurement (use the correct calibration) ___-1.3OC___
TOPIC 2: Matter and Energy
6. Describe each picture as
A. pure substance or mixture
B. elements, compounds, or both
A.__mixture_
A.___ pure ___
A.__ mixture __
B.___element____
B.____compounds___
B.____elements__
7. Know the difference between Endothermic and Exothermic
State whether the following changes are endothermic (endo) or exothermic (exo)

some strikes a match
___Endo__- the match burning is exo_____

baking a cake in the oven
____endo_______

a firework exploding
____exo_____________
8. What is the difference between chemical and physical changes?
Physical change – (like solid to liquid), no new matter formed
Chemical Change - new matter is formed – it has different properties from original
9. Matching – Draw a Line between the word and the corresponding definition
matter
a mixture where you CAN’T see distinct parts/boundaries
energy
a physical blend of two or more components
element
a mixture where you can see distinct parts/boundaries
compound
a pure substance made of two or more different atoms
mixture
anything that has mass and takes up space
heterogeneous mixture
a pure substance made up of only one type of atom
homogeneous mixture
the ability to do work
TOPIC 3: Atomic Structure
Ne -20
10
20
10
electron
configuration
2-8
56 Fe
26
26
56
30
2-8-14-2
Calcium-39
20
40
20
2-8-8-2
P-31
15
31
16
2-8-5
# of protons
Mass Number
# of protons
# of Neutrons
# of electrons
Charge
Na+1
11
10
+1
O-2
8
10
-2
C+4
6
2
+4
10. Define
A. Atomic Number ___number of protons____________________________________
B. Atomic Mass ____sum of protons and neutrons________________________
C. Proton (charge and location) ___positive, in the nucleus_______________________
D. Neutron (charge and location) __ neutral, in the nucleus _______________________
E. Electron (charge and location) _____ negitive, in the nucleus ____________________
64
29
Cu+2
11. Using the isotopic notation above, what does 64 represent? ___mass number____
12. Using the isotopic notation above, what does 29 represent? ___atomic number__
13. Using the isotopic notation above, what element is this? __copper__
14. Using the isotopic notation above, is this element neutral or does it have a charge?
_____charge of +2____________
15. Using the isotopic notation above, how many electrons are there? ____29 – 2 = 27 _____
16. Using the isotopic notation above, is this element a metal or nonmetal? __metal____
Topic 4: Nuclear Chemistry – there will be NO Half Life problems
17. Define Half Life
the amount of time it takes for one half of the mass of a radioactive substance to decay
Complete and balance the following radioactive decay reactions. [use Table N to find the
decay mode] if it’s not given
18.
226
19.
14
20.
3
21.
85
88Ra
6C
2He
36Kr
→
+
→
222
86Rn
→
0
-1e
1
1H
+ _42He_
+ __147N__
→
4
2He
+ _01e__
__0-1e__ + ____8537Rb___
22. What is the difference between Fission and Fusion. Give an example of each.
Fission is the division of a large Radioisotope
238
Fusion is the fusing of to small Isotopes, H and He
3
92U
1H
→
132
55Cs
+21H  42He +
+
106
1
0n
34Se
+301n + energy
+ energy
23. What is an isotope?
Isotope, protons remain the same, but number of neutrons changes, C-12 and C-14
24. What is an ion?
Ion, protons remain the same, but number of electrons changes, Cl vs Cl-1
Topic 5: The Mole
Using the words below, complete the following statements
6.02 x 1023
mole
percent composition
atomic masses
25. Chemists relate units of counting and of mass to a single quantity called the mole_.
26. To find the mass of a mole of a compound, scientists add together the _atomic masses
of all the atoms that make up the compound.
27. There are __6.02 x 1023 _ particles in one mole of any substance.
28. The __percent composition______ of a compound is the percent by mass
of each element in a compound.
Mass Conversions and Gram Formula Mass:
number
of
grams
formula
mass
number
of
moles
29)
What is the mass, in grams, of 4.5 moles of potassium sulfate, K2SO4?
4.5 moles X 174g = 783g
30) A beaker contains 108g of H2O, how many moles does this represent?
108g÷ 18g = 6 moles
31)
K = 2 x 39 = 78
S = 1 x 32 = 32
O = 4 x 16 = 64
174g
H=2x1= 2
O = 1 x 16 = 16
18g
If you wanted to weigh out 0.6 moles of barium fluoride, BaF2, how many grams
would you need?
Ba = 1 x 137 = 137
.6 mol x 175g = 105 g
F = 2 x 19 =
38
175g
Topic 6: Periodic Table – Electronegativity/Ionization Energy/Atomic Radius Not on Test
32. Name the Element (symbol is fine)
_________Fr__________ Period 7, group 1
_________ Br ___________ Period 4, Halogen family
_________ Be___________ 2 energy shells, Alkaline Earth Metal
__________ Ne__________ Noble gas, period 2
___________ Al ________ 3 valance electrons, period 3
_________ S __________ 6 valance electrons, 3 energy shells
__________ He __________ 1 energy shell, 2 valance electrons
___________Ge_________ Row 4, Carbon Family
___________Fr_________ Most reactive Metal
____________F_________ Most reactive Nonmetal
33. Know the Name of all the families
34. What does row (periods) tell us ? ______number of energy shells________________
35. What does columns (families/groups) tell us? ________number of valence electrons_____