Download Midterm Review Sample Content Questions

Midterm Review Sample Content Questions
Metric Units
Solve the following conversions by dimensional analysis. On the line to the left of the problem, identify the
number of significant figures in the value provided.
______1. 1550 kg of water = __________ cm3
______2. 4.570 x 10-8 Mg Au = ____________ mg
______3. 0.0008500 Mm = ___________ cm
______4. 6.7 x 104 μg = __________ g
Solve the following and answer in correct significant figures and units.
5. 45 m3 ÷ 7.0 m = ___________
6. 255 g ÷ 20.0 mL = _____________
7. 800.0 m2 x 20 m = ____________
8. 1.355 cm +
55.2 cm = _____________
Matter and Changes
9. Which of the following signs of a chemical reaction could potentially occur in a physical change too: color
change, temperature change, gas evolution, formation of a precipitate, new substance forms. List any/all that apply
and what conditions must occur for them to be considered physical by providing an example.
10. What is the significance of all physical and chemical changes and the law of conservation of matter?
11. What are properties – chemical vs. physical? Give a few examples of both chemical and physical properties.
12. What is meant by the following: “density is a constant”?
13. How does an increase in temperature affect the density of most substances?
14. The density of lead is 11.3 g/cm3. What is the volume in Liters of 4576 kg of lead?
The Atom
15. Identify the number of electrons, neutrons, protons in the following:
# electrons # neutrons
# protons
A. lead – 204
B. 178 O
C. P3D. calcium ion
E. arsenide ion
16. What is the subatomic particle that varies in an isotope? Which varies in an ion?
17. Which of the ions in problem 15 are anions? How would you recognize an anion?
18. What is the significance of Rutherford’s gold foil experimentation?
19. What is the significance of the Plum pudding model of the atom?
20. Bohr is known for the “planetary model” of the atom – what does this mean?
21. What is the most accepted theory of the atom used in chemistry today?
Nuclear Chemistry
22. Identify the following reactions as alpha, beta, and/or gamma radiation.
A.
B.
+ 10n → 23992U +
59
0
26Fe →
27Co + -1e
238
92U
0
0
59
C.
D.
→ 42He + 22286Rn
0
36
17Cl → -1e +
18Ar
226
36
88Ra
23. Balance the following nuclear reactions by supplying the missing atom or particle.
A. 23993Np → ______ + 0-1e
B.
232
C.
40
D.
90Th
20Ca
→
+
4
238
2He
92U
+ _________
→
70
30Zn
+ 410n + 2_____
4_____ → 42He + 2 01e
24. What criteria are used to determine if an isotope is radioactive?
25. Identify how you know if a nucleus is radioactive?
26. What is the most penetrating radiation – alpha, beta, or gamma?
Nomenclature
27. Provide the name for the following compounds.
A. H2S (g)
E. ZnCrO4
B. H2SO3 (aq)
F. HNO3 (aq)
C. K3PO4
G. Fe(OH)3
D. SnCO3
H. HClO4
I. HBr
28. Write the formula for the following compounds.
A. ammonia
E. cadmium oxalate
B. chromium (III) cyanide
F. lithium oxide
C. acetic acid
G. sulfur dioxide
D. silver nitrite
H. cobalt (II) chloride heptahydrate
29. How do you know if a substance is molecular “covalent” or ionic by its formula?
30. What are the seven diatomic nonmetal molecules?
Quantum Mechanics and Periodicity
31. What is the electron configuration for copper?
32. What is the electron configuration for palladium? How many valence electrons does it contain?
33. What is the Aufbau diagram for phosphorus? How many lone electrons does phosphorus contain?
34. What electron configuration is expressed by the following quantum numbers?
n=4 l= 2 m l = -1 ms = +1/2
35. Identify which of the following sets of quantum numbers cannot occur for an electron. Identify the error and
why it is incorrect. If it is correct identify the proper configuration value, i.e. 3d2.
a. n=3 l= 3 m l = -2 ms = +1/2
c. n=3 l= 2 m l = -1 ms = -1/2
b. n=2 l= 1 m l = -0 ms = -1/2
d. n=5 l= 3 m l = +3 ms = -1/2
36. How many electrons maximum can a d sublevel hold?
37. What is the ionic charge for Barium? What electrons will barium lose to become a cation?
38. What is ionization energy? For aluminum where would you notice a significant rise in ionization energy –
from 1st IE to 2ndIE, 2nd IE to 3rdIE, 3rd IE to 4thIE? Explain how you know.
39. What is the trend for atomic radius across a period? Down a group?
40. Who is the most electronegative atom on the periodic table? What does electronegativity mean?
Use the image shown to answer the corresponding question.
Percent Error
42. Suppose a student measures the mass and volume of a sample of lead in the lab. The mass is recorded as 85.0 g
and the volume is measured and calculated to be 7.10 cm3. The theoretical density of lead is 11.3 g/cm3. Calculate
the percent error for this experiment.
Light Energy
43. Calculate the energy in a light wave if the wavelength is 2.5 x 10-10 meters.