CBSE Class 11-science Answered
<p>Which of the followinf statements are correct ?</p>
<p><strong>(I) in the long form of periodic table, the number of period indicates the value of principal quantum number.</strong></p>
<p><strong>(II)there are four d-block series comprising of total 40 elements in the long form of periodic table.</strong></p>
<p><strong>(III)s-block,d-block and f-block elements are metals</strong></p>
<p>(A) (I) and(II)only</p>
<p>(B) (I)only</p>
<p>(C) (II) and(III) only </p>
<p>(D)(I),(II) and (III)</p>
Asked by Yash Sahu | 10 Apr, 2014, 10:01: AM
Expert Answer
Option (B)---(I) only is correct.
Statement (II) is incorrect because d block elements are less than 40, while statement (III) is incorrect because s-block elemnts consists of hydrogen which is a non- metal.
Answered by | 14 Apr, 2014, 03:26: PM
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