SELECT * FROM question_mgmt as q WHERE id=3620 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=256 and ex_no='4' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Periodic Classification of Element a nbsp what property do all elements in the sam

Question:

(a)  What property do all elements in the same column of the Periodic Table as boron have in common?
(b)  What property do all elements in the same column of the Periodic Table as fluorine have in common?

Answer:

(a) All the elements in the same column as boron have the same number of valence electrons (3). So, they all have valency equal to 3.

(b) All the elements in the same column as fluorine have the same number of valence electrons (7). So, they all have valency equal to 1.


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