preliminary chemistry workbook
Year 11 Chemistry
chemical earth
2.2.1 classification of elements
student name . . . . . . . . . . . . . . . . . . . . . . .
Saturday, 4 June 2016
number
1 a 1
b 2
3
2
4
3
4 a 5
b 6
c 7
8
5
9
6
7 a 10
b 11
c 12
d 13
14
8
15
9
10 a 16
b 17
c 18
d 19
e 20
11 a 21
b 22
c 23
d 24
e 25
result
о ×
number
f 26
g 27
h 28
i 29
j 30
k 31
l 32
m 33
n 34
35
12
13 a 36
b 37
c 38
d 39
14 a 40
b 41
c 42
15 a 43
b 44
c 45
d 46
47
16
48
17
49
18
50
19
о ×
out of 50
applied to the system
□
preliminary chemistry workbook
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2.2.1 classification of elements
chemical earth • Year 11 Chemistry
Question 1
Identify whether each of the following elements would be more likely to exist naturally as an
uncombined element or as a compound.
(a)
Chlorine
1
(b)
Argon
1
Question 2
Compare the reactivity of the elements chlorine and argon.
3
Question 3
Justify the classification of gold as a metal.
3
Question 4
Analyse the following information to classify each of the elements described below as a metal or a
non-metal.
(a)
A malleable, silver-coloured element with melting point 1540 C and boiling point
3000 C .
1
(b)
A yellow powder which is a poor conductor of electricity.
1
(c)
A colourless gas at room temperature.
1
Question 5
Use the information in the table below to classify each element as a metal or a non-metal.
Element
Melting point ( C )
Boiling point ( C )
Conductivity
(a)
(b)
(c)
(d)
(e)
1083
-157
44
1770
-210
2600
-152
280
4530
-196
Good
Poor
Poor
Good
Poor
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Metal or
non-metal
preliminary chemistry workbook
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2.2.1 classification of elements
chemical earth • Year 11 Chemistry
Question 6
Beginning Chemistry students frequently make the mistake of classifying the following
4
substances as non-metals-ammonia (NH3), sodium carbonate (Na2CO3) and carbon dioxide (CO2).
Explain why it is not correct to classify any of these substances as a non-metal.
Question 7
Identify the following elements:
(a)
a non-metal which is a good conductor of electricity
1
(b)
a shiny, silver liquid metal at room temperature
1
(c)
an inert gas used in advertising signs
1
(d)
a non-metal which is liquid at room temperature
1
Question 8
Using a key, shade the following Periodic Table to indicate the positions of metals, non-metals
and semi-metals.
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2.2.1 classification of elements
chemical earth • Year 11 Chemistry
Question 9
Using a key, shade the following Periodic Table to identify which elements occur as solids,
liquids and gases at room temperature.
4
Question 10
Identify whether each of the elements in the following table would exist as a solid, liquid or
gas at room temperature (25 C )
Element
Melting point ( C )
Boiling point ( C )
(a)
1490
2900
(b)
–7
58
(c)
114
183
(d)
–39
357
(e)
–210
–196
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5
Solid/liquid/gas
at room
temperature
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6
2.2.1 classification of elements
chemical earth • Year 11 Chemistry
Question 11
Complete the following table to show the composition of each of the following compounds.
7
The first one is done for you. Hint: Use your Periodic Table to find the names of the elements in
the compounds.
Compound
Carbonic acid
Formula Composition
Hydrogen; Sulfur;
H2SO4
Oxygen
(a)
H2CO3
Sodium hydroxide
NaOH
Calcium hydroxide
Ca(OH)2
Sodium chloride
NaCl
Magnesium
chloride
MgCl2
Water
H2O
Carbon dioxide
CO2
Sulfuric acid
Ratio
2:1:4
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
(k)
(l)
(m)
(n)
Question 12
Explain why there is never a formula for a mixture whereas compounds always have a formula. 1
Question 13
(a)
Salt water is a mixture of two main compounds. Identify these compounds.
1
(b)
Is there a formula for salt water? Explain.
3
(c)
Is there a formula for water or salt? Explain.
3
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2.2.1 classification of elements
chemical earth • Year 11 Chemistry
Question 14
Fill the blanks in the table below to summarise the differences between mixtures and
compounds.
Mixture
Composition varies – can contain
elements and/or compounds in any ratio
4
Compounds
(a)
Components are not chemically
combined together
(b)
Components can be separated by
physical methods
(c)
Properties can vary
(d)
Question 15
List the three most abundant elements and a chemical substance contributing significantly to that
elements’ abundance in the:
(a)
biosphere
3
(b)
lithosphere
3
(c)
atmosphere
3
(d)
hydrosphere
3
Question 16
Which characteristics of germanium make it metal-like and which characteristics make it nonmetal-like?
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2.2.1 classification of elements
chemical earth • Year 11 Chemistry
Question 17
Name three everyday items that contain integrated circuits (silicon chips).
3
Question 18
From the periodic table, classify as metals, non-metals or semi-metals the elements Li, Zn, Se,
Ce, Br, Sb and Xe.
4
Question 19
Explain why the location of the semi-metals on the periodic table is appropriate.
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