SELECT * FROM question_mgmt as q WHERE id=186 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)
What is the basic theme of organisation in the periodic table?
Before 18th century, only a few elements are known and it was quite east to study their chemical and physical properties. But with the passage of time, more and more elements were discovered and it was not possible to study and remember each of them individually. Because many of them have different properties. So, there arise the need of developing a table or chart in which all the elements can be classified according to similar properties ,so that there is less confusion and true information can be generated about the different elements present in periodic table.
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Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.
Report a problem on Specifications: