1
Natural Science
Grade 7
Periodic Table
Section A:
Definitions
Question 1:
Define the following in detail:
1.
element
(5)
_______________________________________________________
________________________________________________________________________
2.
atomic number
_______________________________________________________
________________________________________________________________________
3.
Periodic Table
_______________________________________________________
________________________________________________________________________
4.
ductile
_______________________________________________________
________________________________________________________________________
5.
malleable
_______________________________________________________
________________________________________________________________________
Section B:
Short Questions
Question 1:
Fill in the first 25 elements on the period table (atomic mass may be excluded). (25)
Group
Period
1
18
1
2
13
14
15
16
17
2
3
3
4
5
6
7
8
9
10
11
12
4
Question 2:
Colour in the periodic table, using the key below:
non-metals
semimetals
metals
(3)
2
Natural Science
Grade 7
Periodic Table
Question 3:
Label the following element, then answer the questions which follow:
(6)
2
12
3
Mg
Magnesium
24
1.
2.
Name one metal, non-metal and semimetal in the same period as Magnesium.
(3)
Metal -
_____________________________________________________________
Non-metal -
_____________________________________________________________
Semimetal -
_____________________________________________________________
Name two metals in the same group as Magnesium.
(2)
________________________________________________________________________
3.
Magnesium is a ______________________ in a ____________________ phase of matter.
(2)
4.
List two properties of magnesium, explaining what each one means.
(2)
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Question 4:
State whether the following is TRUE or FALSE. If FALSE, give a reason for your
answer:
1.
Glass is a very good conductor of electricity.
(9)
____________
______________________________________________________________________________
2.
All semimetals are solids.
____________
______________________________________________________________________________
3.
Non-metals and semimetals can be found in all three states of matter.
____________
______________________________________________________________________________
4.
Manganese is the only metal in a liquid state.
____________
______________________________________________________________________________
5.
Non-metals have a high melting point.
____________
______________________________________________________________________________
3
Natural Science
Grade 7
Periodic Table
Question 5:
State the element used in each of the following, classify each element and give the
property/properties that make this element ideal for the use illustrated.
Element
Total:
Classify
/75
(18)
Property that makes
it suitable for this
use.
4
Natural Science
Grade 7
Periodic Table - MEMO:
Section A:
Definitions
Question 1:
Define the following in detail:
1.
element
A pure substance that cannot be broken down further.
2.
atomic number
The atomic number indicates the number of a specific type of
particle within an atom.
3.
Periodic Table
A table with all elements arranged according to their specific
properties.
4.
ductile
The ability of a metal to stretch easily.
5.
malleable
The ability of a metal to be bent easily.
Section B:
Short Questions
Question 1:
Fill in the first 25 elements on the period table (atomic mass may be excluded).
Group
Period
1
1
18
He
H
Helium
Hydrogen
1
2
3
Li Be
14
15
16
17
4
Ne
B
C
N
Litium
Boron
Carbon
O
F
Beryllium
Nitrogen
Oxygen
Fluorine
Neon
7
9
11
12
14
16
19
20
Al
Si
P
S
Cl
Ar
Magnesium
Aluminium
Silicon
Phosphorus
Sulfur
Chlorine
Argon
24
27
28
31
32
36
40
Na Mg
Sodium
23
4
13
K
Potassium
39
Ca Sc
Calcium
40
Scandium
45
Question 2:
Ti
V
Titanium
Vanadium
Chromium
Manganese
51
52
55
48
Colour in the periodic table, using the key below:
non-metals
semimetals
metals
Cr Mn
5
Natural Science
Grade 7
Periodic Table - MEMO
Question 3:
Label the following element, then answer the questions which follow:
2
atomic number
12
3
group number
Mg
Magnesium
24
symbol
name
period number
atomic mass
1.
Name one metal, non-metal and semimetal in the same period as Magnesium.
Metal - Sodium/Aluminium
Non-metal - Phosphorus, Sulfur, Chlorine, Argon
Semimetal - Silicon
2.
Name two metals in the same group as Magnesium.
Beryllium and Calcium
3.
Magnesium is a metal in a solid state.
4.
List two properties of magnesium, explaining what each one means.
Magnesium is shiny, malleable which means it can easily be bent and flattened without breaking
and ductile, which means it can be stretched into thin wires.
Question 4:
State whether the following is TRUE or FALSE. If FALSE, give a reason for your
answer:
1.
Glass is a very good conductor of electricity.
FALSE
Glass is a non-metal and therefore not a conductor of electricity.
2.
All semimetals are solids.
TRUE
3.
Non-metals and semimetals can be found in all three states of matter.
FALSE
Non-metals are either solids, liquids or gases but semimetals are only solids.
4.
Manganese is the only metal in a liquid state.
FALSE
Mercury is the only metal in a liquid state.
5.
Non-metals have a high melting point.
Non-metals have a low melting point. Metals have a high melting point.
FALSE
6
Natural Science
Grade 7
Periodic Table - MEMO:
Question 5:
State the element used in each of the following, classify each element and give the
property/properties that make this element ideal for the use illustrated.
Element
Classify
Property that makes
it suitable for this
use.
Copper (Cu)
Metal
Conductivity and
ductility
Semimetal
Waterproof (has
rubber like
consistency that is
easily applied)
Carbon (C)
Non-metal
Forms very strong
bonds - industrial
diamonds are used for
cutting rocks and
drilling
Iron (Fe)
Metal
Magnets can be made
out of iron, because it
is a magnetic metal
Helium (He)
Non-metal in gas state
Low-density gas replaced hydrogen for
use in air balloons as
it is also non-reactive.
Aluminium (Al)
Metal
Soft and malleable
Silicon (Si)