Question

element which have atmotic no.51 is f-block true or false?​

Answer 1

Answer:

51: The atomic no. of higher noble gas is 54, i.e. of Xenon. Hence, the given element is p-block.

Answer 2

Antimony is a chemical element with the symbol Sb ( from Latin: stibium ) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the Sulfide mineral stibnite (Sb2S3).

Group no = 18 - n

( Exception is f-block elements)

For the element with atomic no. 51:

The atomic no. of higher noble gas is 54, I.e. of Xenon.

Thus,

n = 54 - 51 = 3

Group no = 18 - 3 = 15

Hence, the given element is f-block.

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