Atomic Structure
- Created by: Jasmin
- Created on: 02-11-13 14:19
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- Atomic Structure and the Periodic Table
- John Daltons Theory
- All matter made up of atoms
- Atoms cannot be created or destroyed
- In chemical reactions atoms in the reactants are rearranged to give the products of the reactions
- Relative Abundance
- Nuclear Atom
- Thompson discovered all metals when heated, giave off charged particles (negatively)
- Aston invented mass spectrometer to measure masses of atoms precisly
- Final Rutherford atomic theory
- Nucleus of atom contains a fixed number of positively charged protons
- Neutrons are not charged
- Number of electrons = number of protons
- ATOMIC NUMBER: number of protons in nucleus of an atom of that element
- MASS NUMBER: protons + neutrons
- ISOTOPE: an atom that has a different number of neutrons but same number of protons
- RELATIVE ATOMIC MASS: weighted average mass of an atom of that element divided by 1/12 the mass of a carbon-12 atom
- John Daltons Theory
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