Chemical Bonding
- Created by: SianSmith
- Created on: 26-05-17 09:51
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- Ionic Bonding
- The + and - ions strongly attract and this creates a regular crystal structure.
- Metal and Non-Metal
- Sodium + Chlorine (Sodium Chloride)
- Magnesium + Oxygen (Magnesium Oxide)
- Chemical Bonding
- Covalent Bonding
- Occurs between two non-metals.
- Hydrogen and Chlorine. (Hydrogen Chloride)
- Carbon and Oxygen. (Carbon Dioxide)
- Shares electrons to gain a full outer shell.
- Types of Covalent Bonds
- Simple Molecular
- Diatomic Molecules (Water/Ammonia)
- Giant Covalent Structures (Macromolecules)
- Silicon Dioxide (Silicon and Oxygen)
- Similarities and Differences
- Both have very strong covalent bonds with no charged ions. This means that they don't conduct heat or electricity.
- Simple structures have low melting and boiling points. Giant covalents are the opposite.
- Simple Molecular
- Occurs between two non-metals.
- Metallic Bonding
- There is a strong electrostatic attraction between delocalised electrons and close packed metal ions. This means that it can conduct heat and electricity really well.
- Properties of metals
- Malleable (Can change shape)
- High Melting and boiling point.
- High tensile strength
- Covalent Bonding
- Electrons are transferred from one atom to another to produce ions
- If an atom gains an electron, it has a negative charge and is called an anion.
- If an atom loses an electron, it has a positive charge and is called a cation.
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