Atoms
- Created by: beth
- Created on: 30-12-12 21:36
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- Atoms
- STRUCTURE
- Atoms have a NUCLEUS made up od PROTONS and NEUTRONS
- Electrons surround the NUCLEUS
- PROTONS have a POSITIVE charge
- NEUTRONS have a NEUTRAL charge
- ELECTRONS have a NEGATIVE charge
- The MASS NUMBER is the amount of PROTONS + NEUTRONS
- The ATOMIC NUMBER is the number of ELECTRONS and PROTONS
- To calculate the number of NEUTRONS= MASS No.- ATOMIC No.
- ELEMENTS are substances made up nof ONE TYPE of atom
- COMPOUNDS
- COMPOUNDS are atoms which for CHEMICAL BONDS with other atoms
- IONICBONDING
- Compounds formed from METAL and NON-METAL consists of ions
- Invovles TAKING or GIVING ELECTRONS
- METAL atoms LOSE electrons to form POSITIVE IONS
- NON-METAL atoms GAIN electrons to form NEGATIVE IONS
- The charges of the ions are OPPOSITE and so are STRONGLY ATTRACTED to each other
- COVALENT BONDING
- Compound formed from NON-METALS consists of MOLECULES
- Each atom SHARES an electron with another atom
- Each atom MUST make enough covalent bonds to FILL ITS OUTER SHELL
- STRUCTURE
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