Atomic Structure-C4
- Created by: Shannon
- Created on: 31-05-13 10:57
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- Atomic Structure
- Elements with the same atomic number but different mass numbers are isotopes
- Atomic number- number of protons (=number of electrons)
- Atomic mass- number of neutrons+ protons
- The elements in the periodic table are arranged in order of increasing atomic mass
- E.g. An element with an electronic structure of 2.8.6 has 3 electron shells, so is in the third row
- The atomic number is 16, so the element is sulphur
- E.g. An element with an electronic structure of 2.8.6 has 3 electron shells, so is in the third row
- Dalton had a provisional explanation, which was later confirmed by the better evidence of JJ Thompson, Rutherford and Bohr
- Geiger and Marsden had some unexpected results which made significant contributions to Rutherford and Bohr's ideas
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