Metals And Non Metals Flashcards

1
Q

What are the exceptions of these properties

A
The alkali metals (group 1)
Because:
Their  soft 
Have low melting points
Low densities 

Also Mercury as it is a liquid at room temperature which is unusual for a metal

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2
Q

Metals and symbols

A
Copper CU
zinc ZN
aluminium AL
Iron FE
Silver AG
gold AU
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3
Q

Properties of metals

A
Electrical conductors 
Heat conductors 
Shiny 
Sonorous 
Ductile
Malleable 
High melting points
Hard and dense
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4
Q

What are the non metal properties

A

Low melting points
Brittle
Poor heat conductors
Poor electrical conductors

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5
Q

Non metals exceptions

A

Carbon, in the form of graphite, is a good electric producer
Carbon i the form of diamond Is very hardened has a high melting point

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6
Q

What is an alloy

A

An alloy is a mixture of metals
Metals are heated till molten and mixed together
They have different properties to when they were metals alone

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7
Q

What are 3 example of alloys(name + what their made up of+ use of this alloy)

A

Brass - composition : copper+ zinc use: musical instruments

Bronze - composition : tin+ copper use: statues

Stainless steal - composition : iron+ chromium + nickel use: knifes

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8
Q

What is corrosion

A

Corrosion is an undesirable process where by a metal changes to its oxide or some other compound by combing with oxygen from air

Eg gold and silver do not corrode copper be ones coated with a green coloured substance on exposure to air

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9
Q

What is rusting

A

Rusting is the corrosion of IRON
FORMS ON THE Surface of iron (or steel) when exposed to air or wate r
It turns into hydrated iron oxide which is a SOFT CRUMBLY BROWN substance which flakes off leaving the next layer of iron to rust

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10
Q

How to prevent rusting

A

Greasing
Painting
Give metal a shock ie.passing a small electrical current through
Galvanising
Coating with a material that prevent oxygen and water from getting to the metal

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11
Q

What is the activity series

A

This series describes the rate at which metals react with substances like water and acid
Some metals are more reactive
The series shows that the most reactive metals will be at the top of the series and the least reactive will be at the bottom of the series

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12
Q

What is the activiypty series

A
CATS MAKE ZEBRAS CRY 
CALCIUM ca
MAGNESSIUM mg
ZINC zn
COPPER cu
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