Physical Properties Homework
Name: _________________________
35. Explain what physical properties of metal would be a good
choice of material for each of these products and why:
a. Cooking pot
b. Power lines
c. Refrigerator door
36. Describe how the difference between metals and nonmetals
can be detected.
37. For each item below, choose the most appropriate term. In
some cases, you may have more than one term listed:
compound (C), molecule (M), element (E) or atom (A).
a. ______ Basic unit of an element
b. ______ Water
c. ______ Pure substance
d. ______ Smallest part of a compound
e. ______ O3
f. ______ salt
g. ______ Carbon
h. ______ Two or more elements chemically bonded
together
i.
______ The subscript in H2O
j.
______ C6H12O6
k. ______ One or more atoms that are chemically
bonded together
38. Write the name of the family that is described in a-g:
a. Does not react with other elements
b. End in –ine
c. React by losing 2 electrons
d. Poor conductor of electricity
e. 1 electron in the outer shell
f. Contains many unstable elements that do not occur
naturally on earth
g. Can be mixed with other metals to make alloys
39. CaCO3, CO2, CuSO4, NaHCO3
Rank the compounds listed above from greatest to least
based on:
a. The number of different elements.
b. The total number of atoms.
40. What is the ratio of Sodium (Na) to Chlorine (Cl) atoms in
the chemical formula NaCl? _________
41. The ratio of Carbon to Oxygen atoms in Carbon Dioxide is
1:2. How would you write its formula? _________________
42. The molecule commonly known as Acetylene (C2H2) is
made up of what types of atoms (and how many of each)?
43. The molecule commonly known as Nutrasweet
(C14H18N2O5) is made up of what types of atoms (and how
many of each)?
Density Classwork
Name: _________________________
44. Complete the table below. Show your mathematical work on
another sheet of paper. A periodic table displaying the
density of elements is provided to help you.
Mass
(g)
Volume
(cm3)
345.5
356.1
155.3
57.5
94.2
Density
(g/cm3)
4.54
Element
Mass
(g)
Volume
(cm3)
10.13
2.7
59.6
4.88
3.14
53.6
23
Density
(g/cm3)
Element
7.13
Answer the following questions.
45. Can a sample of an element be identified by its mass
alone? Why or why not?
46. Suppose you had samples of equal mass for every element
on the periodic table.
a. Which elemental sample would contain atoms that are
the most closely packed together? Justify your
answer.
b. The least closely packed? Justify your answer.
47. You have one 3g sample of Nickel and one 3g sample of
Manganese.
a. Which sample takes up more physical space? Justify
your answer.
b. Would either sample float in water? Why or why not?
48. A graduated cylinder is filled with 50mL of water. A sample
of gold with a mass of 39.5 grams is dropped into the water.
What will be the new water level on the graduated cylinder?
Justify your answer.
Density Homework
Name: _________________________
For each question below, show your work and/or justify your
answer.
35. What is the density of a piece of wood that has a mass of
25.0 grams and a volume of 29.4 cm3?
36. I threw a plastic ball in the pool for my dog to fetch. The
mass of the ball was 125 grams. What must the volume be
to have a density of 0.500 g/mL? (I want it to float of
course!)
37. What is the mass of a 12cm3 sample of pure silicon with a
density of 9 g/cm3?
38. A piece of wood that measures 3.0 cm by 6.0 cm by 4.0 cm
has a mass of 80.0 grams. What is the density of the
wood? Would the piece of wood float in water?
(Hint:
recall how to determine the volume of a rectangular shaped
object)
39. A strand of gold-colored metal beads was measured to
have a mass of 425 grams. The beads are placed in a
graduated cylinder where the original water level was 10mL.
After the beads are placed in, the new water level in the
graduated cylinder is 58mL. Given the following densities,
identify the metal:
Gold
19.3 g/mL
Copper
8.86 g/mL
Bronze
9.87 g/mL
40. An ice cube measuring 5.80 cm by 5.80 cm by 5.80 cm has
a density of 0.917 g/mL. What is the mass?
41. The density of aluminum is 2.70 g/mL. If the mass of a
piece of aluminum is 244 grams, what is the volume of the
aluminum in cm3?