) What is the relationship between the group number and the number of valency electrons?
Question
What is the relationship between the group number and the number of valency electrons?
Solution
The relationship between the group number and the number of valency electrons is direct in the Periodic Table. For elements in Groups 1 to 2 (the s-block) and Groups 13 to 18 (the p-block), the group number corresponds to the number of valency electrons. For example, elements in Group 1 have 1 valency electron, elements in Group 2 have 2 valency electrons, and so on.
However, this relationship does not hold for the transition metals in Groups 3 to 12 (the d-block) and the lanthanides and actinides in the f-block. These elements have more complex electron configurations and their valency can vary.
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