Chemical Bonds
- Created by: Chamy
- Created on: 01-05-13 00:38
View mindmap
- Chemical Bonds
- Ionic
- Cations
- Metal atoms lose electrons to form positively charged ions
- Anions
- Non metal atoms gain electrons to form negatively charged ions.
- Ions in an ionic compound are arranged in a regular way, called a lattice structure.
- There are strong electrostatic forces of attraction between the oppositely charged ions.
- High boiling and melting points, usually solids at room temperature
- Untitled
- High boiling and melting points, usually solids at room temperature
- Conduct electricity when aqueous or molten as only these times are charged particles freely able to move
- There are strong electrostatic forces of attraction between the oppositely charged ions.
- Cations
- Covalent
- Simple molecular covalent substances
- Gases such as: hydrogen, methane, oxygen, and carbon dioxide
- Liquids such as: water
- Substances have low melting and boiling points because there are only weak forces between neighboring molecules
- Not gained or lost an electrons, so, no charged particles, that can move around so poor conductors of electricity
- Giant molecular covalent substances
- Billions of atoms all joined together by covalent bonds
- high melting and boiling points
- All atoms are joined to other atoms with strong covalent bonds- a lot of heat energy is needed to break these bonds.
- Carbon can form two different types of giant molecular structure- diamond & graphite
- Diamond is very hard
- Graphite is very soft
- Diamond
- Very hard because all atoms are joined together with strong covalent bonds. Diamonds are used to make cutting tools.
- Does not conduct electricity as there are no free electrons or charged particles to move around
- Graphite
- Easily rubs away in layers because although the covalent bonds are strong, there are only weak forces between layers. It is soft enough to be used as a lubricant.
- Conducts electricity because there is one electron from each carbon atom that can move along the layers. This means that graphite can be used to make electrodes.
- Simple molecular covalent substances
- Ionic
Comments
No comments have yet been made