C5- Chemicals of the Natural Environment

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  • Created by: emily_and
  • Created on: 07-05-14 11:45
Q. Name a gas in dry air that is a compound?
A. Carbon Dioxide
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Q. Explain why most molecular substances are gases.
A. Because they have a low melting point and boiling point.
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Q. What is covalent bonding?
A. When atoms share electrons.
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Q. What is the Earth's hydrosphere?
A. The oceans.
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Q. Why do solid ionic compounds form crystals?
A. Because lots of oppositely charged ions strongly attract to form a lattice of built up ions.
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Q. Why does graphite conduct electricity?
A. Because is is insoluble in water and has a high melting point.
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Q. What is an ore?
A. Rocks that contain varying amounts of minerals from which metal can be extracted.
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Q. What is electrolysis?
A. The decomposition of a substance using electricity.
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Q. Why can a molton ionic crystal act as an electrolyte?
A. Because they contain free ions.
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Q. Why have metals got high melting points and boiling points?
A. Because they have very strong metallic bonds.
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Other cards in this set

Card 2

Front

Q. Explain why most molecular substances are gases.

Back

A. Because they have a low melting point and boiling point.

Card 3

Front

Q. What is covalent bonding?

Back

Preview of the front of card 3

Card 4

Front

Q. What is the Earth's hydrosphere?

Back

Preview of the front of card 4

Card 5

Front

Q. Why do solid ionic compounds form crystals?

Back

Preview of the front of card 5
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