The Modern Periodic Table

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  • Created by: Jo Wells
  • Created on: 02-04-13 14:01

Not all scientists thought the periodic table was important - thought there wasn't enough evidence

But when newly discovered elements fitted Mendeleev's gaps this was convincing evidence

With more evidence, many more scientists realised the periodic table was a useful tool for predicting properties of elements

In late 1800s, scientists discovered protons, neutrons and electrons

The modern periodic table is based on electronic structure

  • is arranged in order of atomic number
  • all elements were put into groups
  • apart from the transition metals, elements in the same group (vertical) have the same number of electrons in their outer shell - e.g…

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