• Created by: sara.5
  • Created on: 14-04-18 14:32
What is meant by the term ion?
A ion is an atom with a positive or negative charge
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What is a cation?
An ion with a positive charge
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What is anion?
ion with a negative charge
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What is meant by ionic bond?
the electrostatic attraction between ions of a metal and non-metal in ionic bonding electrons are transferred
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What do all ionic compounds form?
A large ionic lattice
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What is a lattice?
A lattice is a regular and repeated arrangement of atom They look angular because they are made of crystal which can be split along certain angles
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What are some properties of lattices?
-Closely packed ions of opposing charge in a regular lattice arrangement -Held together by very strong electrostatic forces of attraction - High melting/boiling point -Conduct electricity when molten or dissolved but not when solid
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Why do they have high/low melting point?
Due to th strong electrostatic attraction between the bonds
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Are they soluble?
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Do they conduct electricity?
Yes only when molten/aqueous though due to free charged ions
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What is Covalent Bonding?
When Non-Metals share pairs of electron to form a molecule
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Where is there a strong electrostatic attraction?
Between the positive nuclei and negative electrons
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Where is there a weak electrostatic attraction?
between the molecules
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Why do molecules have low melting/boiling point?
The bonds between atoms in a covalent molecule are very strong due to electrostatic attraction between the positive nucleus and the negative electrons However there is a weak inter-molecular attraction so not a lot of energy is required to break a
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Why are covalent molecules poor conductors?
they have no free electrons to carry charge
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What is a polymer?
A long chain molecule that is made by joining many small molecules together.
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Why do long polymers have high melting and boiling point?
Because there are more bond and inter molecular attraction and because they get tangled up
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Other cards in this set

Card 2


What is a cation?


An ion with a positive charge

Card 3


What is anion?


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Card 4


What is meant by ionic bond?


Preview of the front of card 4

Card 5


What do all ionic compounds form?


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