Transcript Metals in the PTE

Introduction to metals
Examples of metals
• How many different metals can you
write down the name of in 2 minutes?
• What do these metals have in common?
• What might be different about these
metals?
• Of the 90 naturally occurring elements,
70 are metals
Of the 90 naturally occurring elements, 70 are metals
Gold
Silver
Nickel
Sodium
Mercury
Bronze
Key question
1. Why are metals important?
Uses of metals
• You need to match the use of a metal
with a property that makes it suitable
for that use.
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Why
Why
Why
Why
Why
is
is
is
is
is
copper used in electrical wiring?
aluminium used to build aeroplanes?
gold used in jewellery?
aluminium used to make saucepans?
iron used to build bridges?
• Silver is a better
conductor than copper.
Suggest why it is not
used in electrical wiring.
• Which of the metals in
the table is not an
element?
• Present this information
in a bar graph.
Learning outcomes
Know examples of uses of metals.
Success criteria
You can describe five different
uses of metals, including:
–a brief description of the use
–the name of the metal used
Given information about physical
and/or chemical properties, you can
suggest a suitable metal for a
particular use.
Learning outcomes
Understand the occurrence of
metals in nature.
Success criteria
You can state how many of the
elements occur naturally as metals.
You can state whether most metals
occur naturally as elements or as
compounds.
Key questions
1. Where do metals come from?
2. Which metal is the most common on
Earth?
3. How reactive are metals?
Compounds of metals
Metal found in nature as…
Element only
Element and
compound
Compound only
Key question
• What does this information on how the
elements exist tell you about how
reactive they are?
• Add an arrow to your table to illustrate
this point.
Metal found in nature as…
Element only
Element and
compound
Increasing reactivity
Compound only
What are the 10 most
common elements in the
Earth’s crust?
• Make a copy of this list and highlight the metals.
• Make a pie chart to illustrate the abundance of the first five elements
in this list, grouping the rest as “others”.
Learning outcomes
Understand the occurrence of
metals in nature.
Success criteria
You can state how many of the
elements occur naturally as metals.
You can state whether most metals
occur naturally as elements or as
compounds.