c1 questions from revision book

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Which two particles are found in the nucleus of an atom?
Protons and Neutrons
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What is the connection between the number of electrons in the highest energy level of an atom (the outer shell) and the group the element is in?
The periodic table groups the elements in terms of electronic structure. Elements in the same group have the same number of electrons in their highest energy level (outer shell) and this gives the similar chemical properties.
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What is the electron configuration of the atom of magnesium?
2,8,2
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Calcium Carbonate can be decomposed upon heating (thermal decomposition) to make which two compounds?
calcium oxide and carbon dioxide
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What is the chemical test for carbon dioxide gas?
Limewater turns cloudy is carbon dioxide is present
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What substance is powdered limestone mixed with to make cement?
Clay
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Ores are mined and may be ______ before metal is extracted and then _____
concentrated; purified
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Iron is converted into steel by mixing iron with which element?
Carbon
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Copper can be extracted from low-grade ores by what two methods?
Phytomining and bioleaching
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What is an alloy?
A mixture of a metal with at least once other substance or element
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Why is pure iron soft and malleable?
Because the layers are easily able to slide over each other
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Why are most metals in everyday use e.g. copper and aluminium, mixed with small amounts of other metals?
To strengthen them
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What is the name of the block of metals in the middle of the periodic table?
Transition metals
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Which two chemical elements make up most of the molecules in crude oil?
carbon and hydrogen
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What is the name of the process by which crude oil is seperated?
Fractional distillation
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Name two gases that may be released into the atmosphere when a fuel burns?
Carbon dioxide; water (vapour); carbon monoxide; sulfur dioxide; oxides of nitrogen
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What are the major environmental concerns over releasing carbon dioxide and sulfur dioxide into the atmosphere
Acid rain and global warming
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What name is given to the process by which hydrocarbons are broken down into smaller, more useful molecules?
Cracking
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What name is given to unsaturated hydrocarbons?
Alkenes
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What is the chemical test for alkenes?
Add bromine water; it turns from orange to colourless (is decolouriesed)
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What name is given to the small molecules that join together to form polymers?
Monomers
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The Earth consists of a core, ______ and _______
mantle; thin crust
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Convection currents withing the Earth's mantle cause the crust's plates to ______ slowly
move
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Earthquakes and / or volcanoes can occur at the boundaries between _____ _____
Tectonic plates
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Why are vegetable oils important foods?
They provide energy and nutrients
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Why can vegetable oils be used to cook foods at higher temperatures than water?
Vegetable oils have a higher boiling point than water
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Give two uses of emulsions
Salad dressings; ice creams; cosmetics; paints
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What kind of bond do unsaturated vegetable oils contain?
Double carbon-carbon bonds
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Which two gases is the atmosphere mainly made up of?
Nitrogen and oxygen
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Name one other gas present in the atmosphere
Carbon dioxide; water vapour; Noble gases
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How is oxygen thought to have been released into the atmosphere?
By plants (photosynthesis)
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What are the two main ways that carbon dioxide is absorbed from the atmosphere?
In sedimentary rocks and by the oceans
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Other cards in this set

Card 2

Front

What is the connection between the number of electrons in the highest energy level of an atom (the outer shell) and the group the element is in?

Back

The periodic table groups the elements in terms of electronic structure. Elements in the same group have the same number of electrons in their highest energy level (outer shell) and this gives the similar chemical properties.

Card 3

Front

What is the electron configuration of the atom of magnesium?

Back

Preview of the front of card 3

Card 4

Front

Calcium Carbonate can be decomposed upon heating (thermal decomposition) to make which two compounds?

Back

Preview of the front of card 4

Card 5

Front

What is the chemical test for carbon dioxide gas?

Back

Preview of the front of card 5
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