Chemical Bonding


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  • Created by: Summer
  • Created on: 15-01-10 12:10


Ions are electrically charged particles formed when atoms lose or gain electrons

Metal atoms form positive ions wheras non metals negative ions

the strong electrostatic forces of attraction between oppositely charged ions are called ionic bonds

ionic compounds have high boiling and melting pints

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When an atom has a full outer shell it is fully stable and unreactive like noble gases, however most atoms dont have a full outer shell.

When atoms react they take part in change which make them stable they either use covalant or ionic bonding.

when a atom loses or gains an electron from its outter shell it is stable and becomes an ion.

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Calculating Charges

The number of charges on an ion formed by a metal is equal to the group it is in.

The number of charges on an ion formed by a non-metal is equal to its group - 8.

Hydrogen forms H+ ions.

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Covalent Bonding

this is when atoms share electrons.

can be represented by a straight line or dot and cross diagrams.

Hydrogen and chlorine can each form one covalent bond, oxygen two bonds, nitrogen three, and carbon four.

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