Chemistry

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  • Created by: Pippa
  • Created on: 09-06-13 17:50
What does the middle of the atom contain?
Protons and neutrons
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What charge to protons have?
Positive charge
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What charge to neutrons have?
No charge (they're neutral)
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What charge to electrons have?
Negative charge
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The first shell can only contain how many electrons?
2
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The second shell and the shells after that can contain how many electrons?
8
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Atoms join together to make..?
Compounds
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What happens when elements react?
Atoms form chemical bonds with other atoms to form compounds.
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A compound which is formed from a metal and non-metal consisits of?
Ions
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The metal atoms lose electrons to form..?
Positive ions
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The non-metal atoms gain electrons to form...?
Negative ions
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What do opposite charges result in?
The opposite charges mean that they're strongly attracted to each other.This is IONIC BONDING.
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What is covalent bonding?
A compound formed from non-metals consists of molecules.Each atomshares an electron with another atom.-This is called a COVALENT BOND.
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What is an example of a compound?
Carbon + oxygen --> carbon dioxide
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Limestone chemical name is..?
Calcium carbonate (CaCo3)
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What does calcium carbonate produce when heated?
Calcium oxide and carbon dioxide
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Calcium oxide reacts with water to make..?
Calcium hydroxide
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What can calcium hydroxide be used for?
It is an alkali so can be used to neutralise acidic soil in fields and can also be used to test for carbon dioxide.
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How can calcium hydoroxide be used to test for carbon dioxide?
If you make a solution os calcium hydoroxide in water(called limewater) and bubble gas through it,the solution will turn cloudy is carbon dioxide is present.The cloudiness is caused by the formation of calcium carbonate.
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What is powdered limestone used for?
It can be heated in a kiln with powdered clay to make cement.
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What can cement be mixed with to make mortar?
It can be mixed with sand and water to make mortar.
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What else can cement be mixed with to make cement?
Sand and aggregate (water and gravel) to make concrete.
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What are the effects of quarrying limestone?
It creates massive holes that ruin the LANDSCAPE. It make lots of NOISE and DUST pollution. It destroys HABITATS. Transportation produces CO2 and more NOISE.
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What are the effects of making limestone?
Cement factories make a lot of dust that can cause BREATHING PROBLEMS in some people. ENERGY is needed to produce cement and quicklime.The energy is likely to come from burning FOSSIL FUELS which cause pollution.
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What are the advantages of limestone?
It creates houses and roads.Limestone products can be used to neutralise acidic soil. It can neutralise sulphur dioxide which causes acid rain. It can provide jobs (quarrying and making)
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Other cards in this set

Card 2

Front

What charge to protons have?

Back

Positive charge

Card 3

Front

What charge to neutrons have?

Back

Preview of the front of card 3

Card 4

Front

What charge to electrons have?

Back

Preview of the front of card 4

Card 5

Front

The first shell can only contain how many electrons?

Back

Preview of the front of card 5
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