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14 Cards in this Set
- Front
- Back
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What is a covalent bond? |
A chemical bond formed when atoms share a pair of electrons |
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What is a covalent substance? |
A substance where the atoms are held together by covalent bonds |
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Representing covalent bonding |
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What is a double covalent bond? |
Two pairs of electrons shared between two atoms |
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What is a triple covalent bond? |
Three pairs of electrons shared between two atoms |
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Advantages of Dot and Cross diagrams |
Useful for showing which atoms the electrons in a covalent bond come from |
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Disadvantages of Dot and Cross diagrams |
Don't show the relative sizes of the atoms or how the atoms are arranged in space |
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What is a displayed formula? |
A chemical formula that shows the atoms im a covalent compound and all the bonds between them. |
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Advantages of displayed formulas |
A great way of showing how the atoms are connected in large molecules |
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Disadvantages of displayed formulas |
They don't show the 3D structure of the molecule, or which atoms the electrons in the covalent bond have come from |
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Advantages of 3D Models |
Show the atoms and their arrangment in space |
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What is a molecular formula? |
A chemical formula showing the actual number of atoms of each element in a compound |
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Disadvantages of 3D Models |
They can quickly get confusing for large molecules where there are lots of atoms to include They don't show where the electrons in the bonds have come from, either |
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Define Molecule |
A particle made up of at least 2 atoms held together by covalent bonds |
