How to define Position of an Element.

1.	How to define Position of an Element.
Answer» In a period, the number of valence shell remains the same for all elements. However, the number of electrons in the valence shell increases from left to right. The position of an element in the periodic table is determined by its electronic configuration e.g. electronic configuration of sodium is 2, 8, 1 i.e., it has three shells and one electron in the outermost shell. Hence, it is placed in period number 3 and group number 1. However, in the case of transition elements this pattern is not followed.

Answer»

In a period, the number of valence shell remains the same for all elements. However, the number of electrons in the valence shell increases from left to right.

The position of an element in the periodic table is determined by its electronic configuration e.g. electronic configuration of sodium is 2, 8, 1 i.e., it has three shells and one electron in the outermost shell. Hence, it is placed in period number 3 and group number 1. However, in the case of transition elements this pattern is not followed.

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