When the periodic table was first released, many scientists thought it was just a bit of fun. At that time, there wasn't much evidence to suggest that the elements really did fit together in that way.
After Mendeleev released his work, newly discovered elements fitted into the gaps he left. This was convincing evidence in favour of the periodic table.
Once there was more evidence, many more scientists relaised that the periodic table could be a useful tool for predicting properties of elements.
In the early 20th century, electrons, protons and neutrons were discovered.This led to scientists accepting the periodic table as it seemed to match up with what was discovered about the structure of the atom.
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