Name:
The Periodic Table is a classification system to show us all the elements that make
up matter all around us. An element is a pure substance made only of particles of
that kind (eg: Oxygen). A compound is made up of 2 or more elements (eg: Water is
made of Hydrogen and Oxygen). Compounds are not shown on the Periodic Table.
Dmitri Mendeleev developed the Periodic Table in 1869. He arranged the elements
in the pattern we still use today, in rows and columns based on their properties.
The rows are called periods and the columns are called groups. Each element has its
own name and chemical symbol. (See diagram on following page).
Atomic Number
Mass Number
7
14
N
Symbol
http://physicsforme.com/2013/05/18/the-new-periodic-table-song-in-order/
Provide the symbols for the first 20 elements in the table below:
Atomic
Number
Element Name
1
Symbol
Atomic
number
Element Name
Hydrogen
11
Sodium
2
Helium
12
Magnesium
3
Lithium
13
Aluminium
4
Beryllium
14
Silicon
5
Boron
15
Phosphorus
6
Carbon
16
Sulfur
7
Nitrogen
17
Chlorine
8
Oxygen
18
Argon
9
Fluorine
19
Potassium
10
Neon
20
Calcium
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www.e-classroom.co.za
Grade 7 Term 2 Natural Science: Matter & Materials: Introduction to the Periodic Table of Elements (Arrangement of Elements)
GRADE 7
Arrangement of elements
© e-classroom 2014 www.e-classroom.co.za
image: Creative Commons
Grade 7 Term 2 Natural Science: Matter & Materials: Introduction to the Periodic Table of Elements (Arrangement of Elements)
GRADE 7
GRADE 7
Name four of these elements that are non-metals:
Name two semi-metals:
What is the atomic number and mass number of Sulfur?
What group is Fluorine in? What period is Sodium in? © e-classroom 2014 www.e-classroom.co.za
Grade 7 Term 2 Natural Science: Matter & Materials: Introduction to the Periodic Table of Elements (Arrangement of Elements)
Name three of these elements that are metals:
Provide the symbols for the first 20 elements in the table below:
Atomic
Number
Element Name
Symbol
Atomic
number
Element Name
Symbol
1
Hydrogen
H
11
Sodium
Na
2
3
Helium
Lithium
He
Li
12
13
Magnesium
Aluminium
Mg
Al
4
5
6
7
Beryllium
Boron
Carbon
Nitrogen
Be
B
C
N
14
15
16
17
Silicon
Phosphorus
Sulfur
Chlorine
Si
P
S
Cl
8
Oxygen
O
18
Argon
Ar
9
10
Fluorine
Neon
F
Ne
19
20
Potassium
Calcium
K
Ca
Name three of these elements that are metals:
Lithium, Beryllium, Sodium, Magnesium, Aluminium, Potassium, Calcium
Name four of these elements that are non-metals:
Hydrogen, Helium, Carbon, Oxygen, Nitrogen, Fluorine, Neon, Phosphorus, Sulfur,
Chlorine, Argon
Name two semi-metals:
Boron, Silicon
What is the atomic number and mass number of Sulfur?
16
32
What group is Fluorine in? 17
What period is Sodium in? 3
© e-classroom 2014 www.e-classroom.co.za
Grade 7 Term 2 Natural Science: Matter & Materials: Introduction to the Periodic Table of Elements (Arrangement of Elements)
GRADE 7
Answer sheet