Name:
These characteristics of materials assist to classify materials into metals or nonmetals:
Appearance
Heat conductivity
State of Matter
Ductile (can stretch)
Magnetism
Melting point
Malleable (can bend)
Electrical conductivity
This is a summary of the properties of metals and non-metals:
PROPERTY
METALS
NON-METALS
Appearance
Shiny
Dull
State of matter
Solids (except Mercury
which is liquid at room
temperature)
Can be either gases, liquids
or solids
Electrical conductivity
Good conductors
Poor conductors
Heat conductivity
Good conductors
Poor conductors
Magnetic
Iron, Cobalt and Nickel are Not magnetic
magnetic
Malleable
Can bend without
breaking
Brittle, break when bent
Ductile
Can be stretched out
Cannot be stretched
Melting point
High (need a lot of heat to Low (many are gases
be melted)
and liquids at room
temperature)
© e-classroom 2014 www.e-classroom.co.za
GRADE 7
Grade 7 Term 2 Natural Science: Matter & Materials: Introduction to the Periodic Table of Elements (Properties of Metals, Non-metals and Semi-metals)
Properties of metals, non-metals and semi-metals
GRADE 7
Write their symbols next to their names below:
Boron
Arsenic Silicon Antimony
Germanium
Tellurium
Semi-metals have some metallic properties and some non-metallic properties. For
example, they look like metals and are shiny, but they aren’t ductile or malleable.
They are semi-conductors as they can conduct electricity but not very well.
Semi-conductors are very popular in the electronics industry. Silicon and
Germanium, for example, are used in devices like computers, phones and radios.
Answer the following:
17
36
17
36
Cl
What is this element’s name? Is it a metal, non-metal or semi-metal?
Name one characteristic of this type of element.
Mg
What is this element’s name? What type of element is it? Provide one word to define these words:
“Malleable”“Ductile”
© e-classroom 2014 www.e-classroom.co.za
Grade 7 Term 2 Natural Science: Matter & Materials: Introduction to the Periodic Table of Elements (Properties of Metals, Non-metals and Semi-metals)
Semi-metals are between the Metals and Non-metals on the Periodic Table.
Semi-metals are between the Metals and Non-metals on the Periodic Table.
Write their symbols next to their names below:
BoronB
Arsenic
As
Silicon
Si
Antimony Sb
Germanium
Tellurium
Ge
T
Answer the following:
Cl
17
36
What is this element’s name? Chlorine
Is it a metal, non-metal or semi-metal?
Non-metal
Name one characteristic of this type of element.
Dull, Brittle, Not ductile, Not malleable, Doesn’t conduct heat or electricity.
17
36
Mg
What is this element’s name? Magnesium
What type of element is it? Metal
Give one word to define these words:
“Malleable”“Ductile”
Bends
Stretches
© e-classroom 2014 www.e-classroom.co.za
Grade 7 Term 2 Natural Science: Matter & Materials: Introduction to the Periodic Table of Elements (Properties of Metals, Non-metals and Semi-metals)
GRADE 7
Answer sheet