Name___________________________________________period ______unit 2 worksheet
1.
2.
3.
What is matter? Give an example of matter and an example of non-matter.
Anything that has mass and takes up space: example: air
non-matter: light
The scientist credited with devising the first periodic table similar to the one we use today was
A. John Dalton
b. Gregor Mendel
c. Dmitri Mendeleev
d. Ernest Rutherford
Suppose element X is a poor conductor of electricity and breaks when hit with a hammer. Element Z is a good conductor
of electricity and heat. In what area of the periodic table does each element most likely belong?
Element X is a nonmetal and element Z is a metal
Element x is on the right and element z is on the left
4.
Write the symbol for each element AND Identify the group number and name of group for each element
a. Argon
b. barium
c . chromium
d. iodine
e. potassium
Ar; 18 noble gas
Ba; 2 alkaline earth Cr; 6 transition
I; 17 halogen
K; 1 alkali metal
5.
Na, K, Li, and Cs all share similar chemical properties. In the periodic table, they most likely belong to the same
a. Row
b. period
c. group
d. element
6.
An unknown element is shiny and a good conductor of electricity. What other properties would you predict for it?
Malleable, ductile, shiny luster
Write the names of each element and identify them as a metal, nonmetal, metalloid, or noble gas
a. K
b. Si
c. Hg
d. Ag
e. Na
f. He
Potassium; metal
silicon; metalloid mercury; metal silver; metal
sodium; metal helium; noble gas
What period on the periodic table do each belong to?
a. Phosphorus
b. cesium
c. zinc
d. Helium
e. Uranium
3
6
4
1
7
What would react similarly to
a. barium
b. bromine
c. Neon
d. sodium
Ca, Mg, Be, Sr
Cl, F, I
Ar, He, Kr, Rn, Xe
K, Cs, Rb, Li, H
7.
8.
9.
10. What is meant by a change in state?
Gas to a liquid; liquid to solid; solid to liquid, liquid to gas, gas to solid, solid to gas
11. Identify each of the following as a physical or chemical change.
a. A piece of wood is sawed in half. physical
b. Milk turns sour. chemical
c. Melted butter solidifies in the refrigerator. physical
d. Frying an egg chemical
e. Water freezing and forming ice physical
12. Classify each as a physical property or a chemical property
a. Aluminum has a silvery color
physical
b. Gold has a density of 19 g/mL
physical
c. Water boils at 100 ⁰C
physical
d. Sodium ignites when dropped in water
chemical
e. Silver tarnishes chemical
f. Mercury is a liquid at room temperature
physical
13. A scientist wants to identify an unknown compound on the basis of its physical properties. The substance is a white solid
at room temperature. Attempts to determine its boiling point were unsuccessful. Using the table, name the unknown
substance. sucrose
Substance
Color
State at room temp.
Boiling point (⁰C)
Oxygen
Colorless
Gas
-183
Water
Colorless
Liquid
100
Sucrose
White
Solid
Decomposes
Sodium chloride
White
Solid
1465
14. Label each as a element, compound, heterogeneous mixture, or homogeneous mixture
a. NaCl
b. Zn
c. sugar water
d. water
e. orange juice with pulp
f. brass (Zn and Cu)
Compound element
homogeneous mixture
compound
heterogeneous
homogeneous
15. Sodium reacts chemically with chlorine to form sodium chloride. Is sodium chloride a mixture or a compound?
compound
16. A mixture is the chemical bonding of two or more substances in any proportion. Is this statement true or false? Explain.
False; a mixture is a physical mix of two or more substances in any proportion.
17. Which of the following are the same?
a. A heterogeneous mixture and a solution
b. A homogeneous mixture and a solution
18. Describe how homogeneous mixtures differ from heterogeneous mixtures.
Homogeneous are the same throughout and heterogeneous mixture show the different components
19. How are the properties of a compound related to those of the elements that comprise it?
They are not related
20. Write the symbol for each (label if they are solid, liquid, or gas at room temperature)
a. tin
b. sodium c. mercury
d. phosphorus e. bromine f. oxygen g. Neon h. sulfur
Sn
Na
Hg
P
Br
O
Ne
S
Solid
solid
liquid
solid
liquid gas
gas
solid
Review problems
3
3
21. What is the mass of a sample of material that has a volume of 55.1 cm and a density of 6.72 g/cm ?
2
3.70 x 10 g
3
22. What is the mass of a sample of material that has a volume of 0.12 L and a density of 1.23 g/cm ?
150 g
23. Calculate the number of mL in 0.602L using unit cancellation.(show work)
602 mL
24. How many significant figures does each of the following have?
a. 0.00920
b. 203.0
c. 3100
d. 2.10
e. 0.005
3
4
2
3
1
25. Calculate and report with the correct number of significant figures 0.081cm x 3.44 cm
2
0.28 cm
26. Calculate and report with the correct number of significant figures: 45.13 cm x 34.12 cm x 24.52 cm
3
37750 cm
27. Calculate and report with the correct number of significant figures: 45.6 mL + 122.45 mL
168.1 mL
23
-2
28. Calculate and report with the correct number of significant figures: 5.6 x10 * 122.45 / 4.3 x 10
27
1.6 x 10
29. How many meters are in 1 km? 1000 m
30.
1000 mL
31. Which is NOT an SI unit?
a. Second
b. kilogram
3
32. What is the SI unit for volume? m
c. degrees Celsius
d. meter
33. An unknown object’s density was found through water displacement. The mass of the object was found to be 3.45 g and
the volume of water in a graduated cylinder was 10.0 mL before the object was placed in it and 14.5 mL after the object
was placed in it. Find the density of the object. (watch sig figs)
0.77 g/mL
34. Find the density of a cube if the mass is 63.56 g and the length is 4.3 cm, the height is 2.1 cm, and the width is 6.1
cm.(watch sig figs)
3
1.2 g/cm
35. Measure the following
a.2.3 cm
b. 1.99 cm
c. 26.5 mL