Covalent Bonding

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  • Created by: joshd
  • Created on: 01-04-14 13:06
What do atoms sometimes prefer to make?
Covalent bonds by sharing a pair of electrons between two atoms.
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Why do atoms make covalent bonds?
As this way, atoms feel that they have a full outer shell.
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What does each covalent provide?
One extra shared electron for each atom.
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What does each atom involved have to do?
Make enough covalent bonds to fill up its outer shell.
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What is formed when atoms make covalent bonds with one or more other atoms?
A molecule.
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Explain about the example of Hydrogen (H2)
Hydrogen atoms have just one electron. They only need one more to complete the first hell so they often form single covalent bonds to achieve this.
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Explain about the example of Hydrogen Chloride (HCl)
This is very similar to H2. Again, both atoms only need one more electron to complete their outer shells.
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Explain about the example of Methane (CH4)
Carbon has four outer electrons, which is half a full shell. To become a 4+ or a 4- ion is hard work, so it forms four covalent bonds to make up its outer shell.
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Explain about the example of Oxygen (O2)
Oxygen atoms have six outer electrons. They sometimes form ionic bonds by taking two electrons to complete their outer shell. However they'll also cheerfully form covalent bonds and share a pair of electrons instead.
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Explain about the example of Water (H20)
In water molecules, the oxygen shares electrons with the H atoms.
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Explain about the example of Carbon Dioxide (CO2)
In carbon dioxide, two oxygen atoms share electrons with a carbon atom.
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Other cards in this set

Card 2

Front

Why do atoms make covalent bonds?

Back

As this way, atoms feel that they have a full outer shell.

Card 3

Front

What does each covalent provide?

Back

Preview of the front of card 3

Card 4

Front

What does each atom involved have to do?

Back

Preview of the front of card 4

Card 5

Front

What is formed when atoms make covalent bonds with one or more other atoms?

Back

Preview of the front of card 5
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