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In Terms of Electronic Configuration, What the Elements of a Given Period and Groups Have in Common? - Chemistry

Short Note

In terms of electronic configuration, what the elements of a given period and groups have in common?

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In general, the elements belonging to a group have the same number of valence electrons .For example, all the group 1 elements have valency one since they have only one electron in their outermost shell.
In general, the elements belonging to a period do not have same valency but their valence shell remains the same. For example, second period has 8 elements with atomic number 3 to 10 but in all of them the valence electrons are present in shell number two.   
Concept Insight:  For elements in a group the number of electrons present in the outermost shell is the same and therefore the elements have same valency and or elements in a period number of electrons present in the outermost shell of elements in a period increase from left to right but the shell does remains the same.

Concept: Periodic Properties - Periodic Properties: Electronegativity
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Frank ICSE Class 10 Chemistry Part 2
Chapter 1 Periodic Properties And Variation Of Properties: Physical And Chemical
Exercise | Q 4 | Page 16
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