C2- structure & bonding
- Created by: Former Member
- Created on: 04-04-14 19:59
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- C2.1
- Chemical bonding
- 2 or more elements= compound
- join by sharing or transferring electrons
- sharing= covalent bonding
- transfer= ionic
- non metals& metals
- join by sharing or transferring electrons
- groups show how many electrons in outer most shell
- 2 or more elements= compound
- Ionic Bonding
- oppositely charged ions- giant structure
- very regular
- strong electrostatic forces
- held firmly in place
- ratio of ions
- depends on the charges
- e.g. Ca+2 & Cl- in 2:1
- use dot&cross diagrams to show this
- oppositely charged ions- giant structure
- Formulae of ionic compounds
- neutral- as you balance charges
- charge on ions shows groups
- ions can be made up of more than one type of element such as OH-
- covalent bonding
- non-metals- share electrons
- held together by covalent bonds are called molecules
- group tells you how many bonds it can make
- atoms which can form several bonds = giant covalent structures
- non-metals- share electrons
- Metals
- atoms all same size
- giant structure
- layers of atoms
- delocalise electrons
- produce lattice
- attract ions and holds structure together
- Chemical bonding
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