Which of the followinf statements are correct ?
(I) in the long form of periodic table, the number of period indicates the value of principal quantum number.
(II)there are four d-block series comprising of total 40 elements in the long form of periodic table.
(III)s-block,d-block and f-block elements are metals
(A) (I) and(II)only
(C) (II) and(III) only
(D)(I),(II) and (III)
Asked by Yash Sahu | 10th Apr, 2014, 10:01: AM
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 | 14th Apr, 2014, 03:26: PM
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