SELECT * FROM question_mgmt as q WHERE id=193 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=9 AND chapterId=44 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

Why do elements in the same group have similar physical and chemical properties?

Answer:

There are 18 groups in periodic table and each group is a  independent group. All the elements present in a group have same  electronic configuration of the atoms. The physical and chemical properties of elements depend on the number of valence electrons. Elements present in the same group have the same number of valence electrons. Therefore, elements present in the same group have similar physical and chemical properties.


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