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  • An element with atomic number 19 belongs to which block?Option: 1 p-blockO

An element with atomic number 19 belongs to which block?

Option: 1

p-block


Option: 2

d -block


Option: 3

s- block


Option: 4

f-block


Answers (1)

best_answer

Entering of the last electron in the particular subshell determines the block of the element.

Electronic configuration of an element having atomic number 19 is = [Ar] 4s1

We can see from E.C that last electron enters in s-subshell. Hence, this element belongs to s-block.

Therefore, correct option is (3)

Posted by

Rishi

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