C2 - Bonding
This shows the three types of bonding.
- Created by: Katie
- Created on: 19-05-13 15:00
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- C2
- Ionic Bonding
- Ionic Compounds are held together by strog fores of attraction between the oppositely charged ions.
- The formula of an ionic compound shows the ratio of ions present in the compound.
- Takes part between a metal (which loses) and a non-metal (which gains).
- When a metal and a non-metal react together, the end result leaves both ions with a full outer shell. they are held together by strong forces of electrostatic attraction, between the oppositely charged ions.
- Key words: electrostatic, ion, ionic, lattice, dot and cross diagram and crystal.
- Will generally take part between atoms in gruop 1 and 7 or group 2 and 6.
- Covalent Bonding
- The negative electrons are shared in the middle of two positive nuclei.
- Each nuclei feels an attraction towards the shared electrons in the middle.
- As electrons are shared inbetween the two atoms, the negative charges of the electrons and the positive charges of the nucleus hold the atoms together through electrostatic attraction.
- This is where a non-metal and a non-metal react therefore it ends up sharing electrons.
- Two non-metals share electrons. the negative electrons are shared in the middle of the two positive nuclei. Each nuclei feels an attraction twoards the shared electrons in the middle.
- Key words: atoms, simple molecules, covalent, shared and electrostatic.
- Metallic Bonding
- Metal atoms are packed together in layers to form a regular pattern known as a lattice.
- Each metal atom loses the electrons in its outer shell, to form positive metal ions. The electrons become delocalized, and are free to move around the whole structure.
- Delocalized - these are the electrons that are not attached to any particular atom/ion, but are free to move around the structure.
- The free flowing electrons are the ones that they lose through ionic bonding.
- The attraction between the positive metal ions and the negative delocalized electrons is what holds everythig together.
- The 'sea' of delocalized electrons can therefore be thought of as a 'glue' that holds the structure together.
- Occurs beween a metal and a metal (therefore they lose).
- In a lattice strucure whilst delocalised electrons act like a 'glue' holding it together with eletrostatic attraction.
- Key words: delocalised, lattice, electrostatic, atoms, 'dea', 'glue' and crystal.
- Ionic Bonding
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