covalent and ionic bonding

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  • Created by: amy24601
  • Created on: 01-02-20 11:41
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  • Covalent and Ionic bonding
    • Covalent bonds are bonds formed between non-metals.
    • Covalent bonds have strong bonds within a molecule and weak bonds between them.
    • covalent bonds have a low melting and boiling point.
    • covalent bonds are bonds that hold non metal atoms together to form a molecule.
    • molecules are two or more atoms held together by covalent (or ionic) bonds.
    • covalent bonds occur when an atom shares its single electron on an outer energy level with another atoms single electron on its outer energy level. forming a molecule.
    • molecules are not found on the periodic table and must be formed ionically or covalently.
    • when water boils the molecules that were held close together move further apart. the weak bonds between molecules are broken.
    • some substance are made from ions. ions have a negative charge.
    • ionic substances can dissolve in water.
    • ionic substances can conduct energy but only when they are melted or dissolved in water. this is because the ions are free to move.
    • ionic bonds need an electron donor and receiver. this is because one atom sends an electron to another so both atoms have full outer energy levels
    • Ionic bonding is between a metal and a non-metal.
    • in ionic bonding the metal loses an electron to become positively charged and the non-metal accepts that electron to become negatively charged.

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