Question

. How does the electronic configuration of an element relate to its position in the Modern periodic table? Explain with one example.
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Answer 1

Answer:

The position of elements depend upon number of valence electrons which depend upon electronic configuration those elements which have same valence electrons occupy same group. Those elements which have one valence electrons belong to group 1 elements, which have two valence electrons belong to group 2. Period numbers is equal to the number of shell.

Example: atomic number of sodium (Na) is 11, so electronic configuration will be 2, 8, 1. Sodium has one valence electron in valence shell so it belong to group 1 as sodium has three shells, so it belong to 3rd period.

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