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CBSE Class 10 Answered

how can we find in which period and group is the given element? is there any proof for finding it?
Asked by | 14 Mar, 2008, 08:43: PM
answered-by-expert Expert Answer

Period number of an element is equal to the number of outermost shell. Like Period Number. of potassium atomic number 19 is 4 as the outermost shell is 4 in electronic configuration 2, 8, 8, 1 . Group number of element is equal to the number of the valence electrons. Group number of element is equal to the number of the valence electrons that is group 1..

Answered by | 20 Dec, 2017, 05:13: PM

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