Question

Why are the elements arranged in the periodic table?
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Answer 1

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The chemical elements are arranged in order of increasing atomic number. ... Elements in the same group have similar chemical properties. This is because they have the same number of outer electrons and the same valency. An example of a group in the periodic table is the alkali metal group.

Answer 2

Answer:

The chemical elements are arranged in order of increasing atomic number. ... Elements in the same group have similar chemical properties. This is because they have the same number of outer electrons and the same valency. An example of a group in the periodic table is the alkali metal group.