Chemistry Unit 1 Foundation Tier

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  • Created by: jessica
  • Created on: 12-06-13 17:27
What are atoms?
Atoms are the smallest particle of a substance
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What are molecules?
Molecules is a larger particle formed by the chemical combination of two or more atoms
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What is a chemical bond?
Chemical bonds are where atoms combine or connect together
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What is the Periodic table made up of? Elements? Atoms? or Molecules?
The Periodic table is made up of elements
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Who developed the periodic table?
Mendeleev developed the periodic table
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What did he do in order to be able to place more discovered elements onto the periodic table?
Mendeleev had to leave gaps for elements which had not yet been discovered
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What are formed when two or more different elements combine together?
When two or more different elements combine together they form compounds
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What are raw materials?
Raw materials are from the earth, sea and air such as gold and coal.
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How does chemistry involve raw materials for industries?
Chemical reactions are used to change raw materials into useful products
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Whats signs are there of a chemical change?
Signs of a chemical change may include colour change, gas evolution and temperature change
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What does breaking a chemical bond require?
Breaking a chemical bond requires energy
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What does making a chemical bond release?
Making a chemical bond releases energy
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What do chemical reactions give out?
Chemical reactions give out energy and or heat
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What has the increase of carbon dioxide in the atmosphere done?
The increase of carbon dioxide in the atmosphere has caused global warming
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What is the cause of the imbalanced amount of carbon dioxide being released into the atmosphere?
The cause of the imbalanced amount of carbon dioxide being released into the atmosphere is due to the combustion/burning of fossil fuels
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What elements are used to form the compound water?
The elements hydrogen and oxygen are used to form the compound water
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balance the equation H(2)O + CO(2) = C(7)H(8) + O(2) the numbers in the brackets are subscripts
4H(2)O + 7CO(2) = C(7)H(8)+9O(2)
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What side of the periodic table are Metals shown?
Metals are shown on the left side of the periodic table
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Where is the Non-Metals shown in the periodic table?
Non-Metals are shown on the right side of the periodic table
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In an atom what is the nucleus surrounded by?
In an atom, the nucleus is surrounded by electrons
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What does the nucleus of an atom contain?
The nucleus of an atom contains protons and neutrons
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Which one is positively charged?
The protons are positively charged
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What in an atom is negatively charged?
The electrons are negatively charged
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What are ores?
Ores are naturally occurring rocks that contain metal or metal compounds
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What is an alloy?
An alloy is a mixture of two or more elements where atleast one element is a metal
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Why are noble gases nonreactive?
Noble gases are non reactive because their atoms have a very stable electron arrangement
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What does the term pure mean in chemistry ?
The term pure mean that only one substance is present inn the material
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every pure substance melts and boils at what temperature?
every pure substance melts and boils at its fixed tempertaure
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What techniques of purification are there?
Materials are purified by various separation techniques such as filtration and crystallisiation
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Other cards in this set

Card 2

Front

What are molecules?

Back

Molecules is a larger particle formed by the chemical combination of two or more atoms

Card 3

Front

What is a chemical bond?

Back

Preview of the front of card 3

Card 4

Front

What is the Periodic table made up of? Elements? Atoms? or Molecules?

Back

Preview of the front of card 4

Card 5

Front

Who developed the periodic table?

Back

Preview of the front of card 5
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