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Density Practice: Worksheet # 1
Calculate density, and identify substances using a density chart. Density is a measure of the amount of mass in a certain volume. This physical property is often used to identify and classify substances. It is usually expressed in grams per cubic centimeters, or g/cm3. The chart on the right lists the densities of some common materials.
Equation: Density = mass or D = m Volume V
Substance
Gold
Mercury Lead Iron Aluminum Bone Gasoline
Air (dry)
/ j,/ Density
(g/cma)
1.7-2. 0.66-0.
Problem Statement Sample: What is the density of a billiard ball that has a volume of 100 cm3 and a mass of 250 g?
- A loaf of bread has a volume of 2270 cm3 and amass of 454 g. What is the density of the bread?
Formula D=m V
D = 250 g
100 cm
D-mr'ÿ/ ÿ,ÿ
V
4.What is the mass of the block of, iron illustrated below?
- A block of wood has a density of 0.6 g/cm3 and a volume of 1.2 cm3. What is the mass of the block of wood?
- A 800g boulder has a density of 8 g/cm3. What is the volume of the boulder?
sÿ
M = 250 g
V = 100 cm
Defme Variables Substitution Answer
2.5 g/cm3.
10 cm
"1%,] o_- jÿ£,ÿm/,,, f-- v'
t it, sÿ t k;'ÿ-,- ,/ÿ,. ' Lÿ)
' # /' ,
4725
171
148
475
680
15
40
250
1000
Use the data below to calculate the density of each unknown substance. Then use the density chart above to determine the identity of each substance. Mass (g) Volume D = m/v
(eraa) Variable Substitutions
350 D = 4725
350
tl' '-)//L.ÿ)_
D ,ÿo
D -
' ÿ 3(I' '
Density
(g/cm3) D = 13.5 (^) Mercury
"!?/ i tC
Substance
Properties of Matter/Density Quiz Name: Date:
- Fill in the missing spaces in the table.
Term Definition
Viscosity
Malleability
Luster
Ability to be stretched and then returned to its initial
size and shape
Tendency to break or shatter
Ability to be pulled into wires
Measure of how much stress or tension a material
can handle without breaking
- A paperclip is placed in water in a graduated cylinder. Before the paperclip was placed in the water, the graduated cylinder measured 5.7 mL. After the paperclip was placed in the water, the cylinder measured 6.3 mL. What is the volume of the paperclip? Show your work. { ÿ;ÿ • ÿ ........ \
3, If the mass of the paperclip in #2 is lÿ;wtiaÿt istlÿe -dÿensity of the paperclip? __ÿ
I
'- iÿ"ÿ 7+, ,ÿ. t^ J^ ÿ^ ....^ ]°,W Iÿ^ H i! t<,Wt'i^ {,,<^ ÿ^ "^ b/^ " !ÿ, ,} ÿ,x ,,+ i, 7 ÿ; 'ÿ "^ 7' 4 7ÿ+vt llf i
CONTENT
Page 2 of 2
Periodic Table Groups
The periodic table's vertical columns are called groups. Groups of elements have similar properties. Use the periodic table and the information found in Chapter 15 of your text to answer the following questions:
15. The first group of the periodic table is known by what name?/0ÿ I kÿ ti ÿ
16, Name two characteristics of the dements in the first group.
- Name three members of the halogen group., t-1-lt)'V !,! ')'Hÿ I(iÿ,nÿ,ÿ,¢ÿ'
18. Describe two characteristics ofhalogens["iÿ)ÿ]{ @ ÿ ÿ :ÿ:
- Where are the noble gases found on the periodic table? i :ÿ{ ÿ(^ ¢
- Why are the noble gases sometimes called the inert gasÿs? ÿ
J .... i-, , ''.. '
Periodic Table Rows
The rows of the periodic table correspond to the energy levels in the atom. The fÿrst energy level can accept up to two electrons. The second and third energy levels can accept up to eight electrons each, The example to the right shows how the electrons of an oxygen atom fill the energy level.
Show how the electrons are arranged in energy levels in the following atoms:.
- He
21ÿ
- N ....
2!
24, A1 lÿ-ÿ)
ooooo ai
2-_Y7i ;:12:!!!
Identify each of the following dements:.
Name (^) "J Jÿ^ k Date
-ÿ}Periodic Table Worksheet
Class
Tell which element is Iocateÿd in the following groups and periods.
a. group 4, period 5 h.
b. ÿ C group 2, period 2 i.
group 16, period 6
group 17, period 3
c. group 6, period 6
d. group 18, period!
j°
k.^ V
group 11, period 5
. group 5, period 4
e. group 14, period 5
f. ÿ v% group 12, period 4
g. , , group 1, period 7
m.
n°
group 10, period 6
group 13, period 3
group 15, period 6
, (^) For each of the following, label as a metal nonmetal, metalloid.
a. i[Lt>@.ÿ./ÿ.dt?'c<{ poor conductor of electricity
b. ÿVÿ, C.ÿ .... t ÿ ÿ usuallyÿ a solid at room temp / ductile
chlorine
semiconductor
silicon
malleable
usually a gas at room temp
cobalt
good conductor of heat
brittle
I. A © v', y, ÿ>>ÿ=t ÿ oxygen
NaminR Covalent Compounds
Nalne: Period:
Write the formulas for the following covalent compounds."
1) nitrogen tribromide
2) hexaboron monosilicide
- crone dÿoxide d tCiÿ
4) hydrogen monoiodide
5) iodine pentafluoride
6) dinitrogen trioxide
nitrogen trihydride (ammonia) /i'd {'ÿ
phosphorus triiodide iÿ) ÿiÿi
9) dihydrogen monoxide
10) diphosphorous pentoxide
Write the names for the following covalent compounds."
II)
iv)
P4S
SF
Si2Br
SC
CH
B2Si
NF
H
N2Os
S,,U I,/i'+j dÿ-=.
. Using the periodic table,^ not Bohr models,^ determine how miny valence electrons the following elements have.
a. Calcium ÿ.ÿ b. Sulfur ÿ c. Neon d. Aluminum'ÿ e. Argon
i0. Using the periodic table, determine what charge each of the following ions will have: a. BeÿfA
b. BiÿI
c. N-% d.F .... t e. Na+[
ii. Determine what compound is formed when the following elements are ionized and combined. Write the formula and name of the compounds. a. Mg + O
b. Cl + Ca
li ................ /
d. Be + N-
e.F+Na id ................. < -
/ 'g
uations Worksheet
lO)
2O)
__ MgF2 + __
P4+
RbNO3 +
-, AgNO3 +__
! CF4 +
HCN +
GaF3 +
CH4 +
2.. NaaP04 +
F2 :->
Li2Se -->
H2SO4 -) t
H2 + AICI
__, NF
I SSe2 +
__ (NH4)2SO
Li
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SCIENTIFIC NOTATION AND SIG FIG REVIEW
SI GIN-IFI CA_NT FIGURES
STATE THE NUlÿIBER OF SIGNIFICAN[ÿ DIGITS IN EACH
Mÿ_A SURElVIENT.
- 2804 ÿi ÿ+ 2) 2.84 ÿ ÿ a) s.0ÿ9 M %
- O. 003068 Ivl Lÿo 5) 4, 6 X 105 Ivi ÿ< 6) 4.06 X 10-5 Ivi
"1) 750 ÿx k 8) 75 ÿ ÿ ..... 9) 75,000 ÿ 5.,.
75.00 rÿ % 11) 75,ooo.o M ÿ
SCIENÿnÿIC NOTATION
19) i0 CM
WRITE EACH NU2VIBER IN SCIENTIFIC NOTATION. 6
0.000006 ÿ x" 10 2) 54000.00 < ÿO<>cÿ ;< '
60 g ?< I'O 4) 0.009 ql i< [Q
5) 6.7 ¢ÿ ÿ?ÿ x{O 6) 0.0000002 ÿ- X
2oooooo G<,?: (0 (^) 8) 71000
489oo ÿf,ÿi ÿ: to lO) 0.oo00009 q ÿ: to
k
ii) 0.630 (ÿ 5 .ill> ,xÿ ÿ0 12) 33 ,^ LIO
3 ;ÿ X I0 •14) 0.0049, £'ÿ, L X {.0; "
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