chemistry test review. 1. label the parts of the atom below. electron neutron proton nucleus
TRANSCRIPT
CHEMISTRY TEST
REVIEW
1. Label the parts of the atom below.
electron
neutron
proton
nucleus
2. All matter is made up of
a. cells b. atoms c. molecules d. compounds
3. Which of the following is not an element?
a. oxygen c. sodium chloride
b. hydrogen d. nitrogen
4. A positively charged particle is
a. an electron c. a neutron
b. a proton d. an isotope
5. Which of the following would be found outside the nucleus of an atom?
a. protons b. electrons c. neutrons d. protons and neutrons
6. A chemical formula like CO2 represents
a. an element c. an atom
b. an electron d. a compound
7. A substance made up of two or more elements that have chemically combined is
a. a mixture c. an atom
b. a compound d. an element
8. A substance that cannot be changed into simpler substances by a chemical change is called a (an)
a. element. c. liquid.b. solid. d. mixture.
9. Al, Cu, N, and O are symbols for
a. compounds. c. elements.
b. mixtures. d. molecules.
10. The elements oxygen, sulfur, selenium and tellurium are all found in the same group (16) on the table. What do we know about the elements in that family?
• The have similar but not identical properties
Periodic Table of Elements
11. In what family is neon found?• Group 1812. What do we call those elements in that group?• Noble Gases13. Describe a property of those elements.• Very nonreactive/inert
14. What element is in Group 16, Period 3?• S15. How many protons does an atom of this element have?• 1616. What kind of element is it?• nonmetal
17. Which element is a metalloid?
a. S (Sulfur) c. Si (Silicon)
b. Ba (Barium) d. Br (Bromine)
18. What are the physical properties of metals?
• Ductile (wires)• Malleable (hammer)• Good conductors of
heat and electricity• Have luster
19. What are the physical properties of nonmetals?
• Brittle (break)• No luster• Poor conductors of
heat and electricity.
• 20. Identify the following:• A. Atomic #• 6• B. Atomic mass• 12.011• C. Mass #• 12• D. # of protons• 6• E. # of electrons• 6• F. # of neutrons• 12-6 = 6
5B
Boron10.81
2He
Helium4.003
11Na
Sodium22.990
17Cl
Chlorine35.453
21. What is the atomic number for Chlorine?
22. What is the atomic mass for Boron?
23. How many protons are in an atom of Na?
24. How many neutrons are in an atom of He?
17
10.81
11
2
Use the information provided to answer the questions.
25. I am a member of the Boron family with 49 protons.
26. I have a total of 74 electrons in an atom.
27. I have an atomic mass of 55.847.
28. I have 8 neutrons in an atom.
In
W
Fe
O
Use a periodic table to help you identify each element. Give its symbol for the answer.
29. Elements that are ductile, malleable and good conductors of heat are known as
a. Nonmetals c. Metals
b. Noble Gases d. Metalloids
30. Elements brittle are known as
a. Nonmetals c. Metals
b. Noble Gases d. Metalloids
31. Elements that have luster are known as
a. Nonmetals c. Metals
b. Noble Gases d. Metalloids
32. Elements in the periodic table are arranged by
a. atomic number
b. atomic weight
c. number of neutrons
d. chemical reactivity
33. Elements at the left of the periodic table are known as
a. Nonmetals c. Metals
b. Noble Gases d. Metalloids
34. Elements at the right of the periodic table are known as
a. Nonmetals c. Metals
b. Noble Gases d. Metalloids
35. In sweetened tea, the sugar is called the
a. solute. c. solvent. b. colloid. d. solution.
36. Which of the following would help sugar dissolve faster in water?
a. stirring the waterb. decreasing the solubility of
sugarc. using larger particles of sugar
d. decreasing the water temperature
37. Describe the difference between a soluble and insoluble substance.
•Soluble: can dissolve•Insoluble: cannot be dissolved
38. Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles?
a. Use tweezers to separate them. b. Add water to the mixture.c. Use a magnet to separate them. d. Pour the mixture into a filter.
39. What is the solubility of KCl at 40°C?
• 40 g salt/100g water
40. What is the solubility of NaCl at 10°C?
• 35 g salt/100g water
41. What is the solubility of K2Cr2O7 at 80°C?
• 58 g salt/100g water
Solubility Curves
42. PHYSICAL OR CHEMICAL CHANGE?
PHYSICAL
43. PHYSICAL OR CHEMICAL CHANGE?
CHEMICAL
44. PHYSICAL OR CHEMICAL CHANGE?
CHEMICAL
45. PHYSICAL OR CHEMICAL CHANGE?
PHYSICAL
46. Identify the solid, liquid and gas! Support your answer.
GasMolecules very far apart
SolidMolecules packed close together
LiquidMolecules a little farther apart
Heat (thermal energy)
Tem
pera
ture
º C
.
100
0
A
B
C
DE
melting
freezing
condensing
boiling
47. Label the phase changes in the heating curve below:
48. The particles of a substance are closest together in
a. a solid b. a liquid c. a gas d. plasma
49. The particles of a substance move most readily in
a. a solid b. a liquid c. a gas
50. The particles of a substance that does not have a definite volume or shape is
a. a solid c. a liquid b. a gas d. plasma
51. When a liquid becomes a solid, energy
a. does not changeb. is releasedc. is absorbedd. is first absorbed, then
released
52. _______ is the process in which liquid changes to gas.
a. Sublimation c. Condensation
b. Evaporation d. Melting
53. The change of a liquid to a solid is called
a. freezing c. meltingb. sublimation d.
vaporization
54. During which of the following processes is there a decrease in the heat content of the form of water indicated?
a. Ice as it forms on a lakeb. Water droplets as they fall to the
groundc. Water as it evaporates from a pondd. Snow as it melts on a mountainside
55. When substances go directly from the solid phase to the gas phase, the phase change is called
a. sublimation c. condensation
b. evaporation d. vaporization
Click on the links below to review :
Phases of Matterhttp://www.harcourtschool.com/activity/states_of_matter/
Mixtureshttp://www.harcourtschool.com/activity/mixture/mixture.html
gas
liquid
solid
condensation
Freezing
evaporation
melting
sublimation
temperature
heat
It increases
Stays the same
Its melting
0 and 100 degrees Celsius
Stays the same
80°C
20°C
liquid
The move faster and farther apart.
No, because the melting point of water is 0°C and the boiling point is 100°C
The slow down and come closer together.
Heat must be removed/released.
Temperature does not change during a phase change.
0°C
solid
freezing
liquid
condensation
gas