chemistry test review. 1. label the parts of the atom below. electron neutron proton nucleus

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