Chem

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What are in a Nucleus of a Atom?
Neutrons and protons
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What charge does a proton have? What charge has a neutron got? What charge does a electron have?
Proton- positive Neutron- not charged Electron- negative charge
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What is the mass number of a atom?
The number of protons and neutrons
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What are electrons and what do they do?
Electrons are tiny negatively charged particles that move around the nucleus.
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Why does a atom have no overall charge?
Because the number of protons is equal to the number of electrons and their charges are equal and opposite(proton +1 and electron -1
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How do you work out the number of protons?
Atomic number
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How do you work out the number of electrons?
number of protons
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How do you work out the number of neutrons?
mass number-atomic number.
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What happens when different elements combine?
They form compounds.
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Metal only?
Metalic
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Metal and Non Metal?
Ionic
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Non Metal and Non Metal?
Covalent
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How do we get Limestone?
Quarry it, blast it out.
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Name the uses of Limestone?
To neutralise lakes and soils, building material, calcium oxide and cement.
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How do you make concrete?
Mix cement with sand, aggregate and water.
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Limestone is mainly......
Calcium carbonate(CaCo3)
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What happens if you heat Limestone strongly?
It decomposes to make calcium oxide and carbon dioxide.
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What happens when you add water to calcium oxide?
It reacts to make calcium hydroxide.
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How do you make cement?
limestone is mixed with clay and heated strongly in a kiln.
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How do you make mortar?
Mix cement sand and water.
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What are the negative effects on quarrying limestone?
It leaves big holes in the ground. A lot of noise is made. Pollution is made due to the machinery. Kills wildlife homes
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What are the advantages of quarrying limestone?
Can leave places for wildlife homes. Makes jobs for people. We need the limestone that's quarried.
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Other cards in this set

Card 2

Front

What charge does a proton have? What charge has a neutron got? What charge does a electron have?

Back

Proton- positive Neutron- not charged Electron- negative charge

Card 3

Front

What is the mass number of a atom?

Back

Preview of the front of card 3

Card 4

Front

What are electrons and what do they do?

Back

Preview of the front of card 4

Card 5

Front

Why does a atom have no overall charge?

Back

Preview of the front of card 5
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