Drawbacks of Mendeleev periodic table

By Rebecca
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Drawbacks of Mendeleev periodic table

Answer:

  1. Hydrogen’s position: Hydrogen had properties that were similar to both alkali metals like lithium and halogens like iodine. As a result, the position of hydrogen was not stated, whether hydrogen should be put with halogen or alkali metals.
  2. Isotopes’ place in Merdelew’s periodic table: Merdelew’s periodic chart was based on placing elements in ascending order of atomic masses, but isotopes were not included.
  3. Some elements were placed in the wrong order. Higher-atomic-mass elements were positioned in front of or ahead of lower-atomic-mass elements. Cobalt and nickel, for example.
  4. Numerous gaps in the periodic table were left because he assumed that several elements had yet to be discovered, such as gallium, which had not been identified at the time.
  5. The VII group’s position is incorrect.

Drawbacks of Mendeleev periodic table

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