Question

Helppppp....

How to find group in d-block ??

Find the period, block and group of the element having it's atomic no. 21....

Class 11th

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Answer 1

Answer:

heya ishika here is ur answer....

Explanation:

For s-block elements , group number is equal to the number of valence electrons.

For p-block elements ,group number is equal to 10+number of electrons electrons in the Valence shell .

For d-block elements group number is equal to the number of electrons in a (n-1) d subshell + the number of electrons in Valence shell .

hope it helps uh...

thanku...

all the best for exams...

Answer 2

$\huge\star{\underline{\tt{\red{Answer}}}}\star$

$\large\star{\mathscr{\blue{\boxed{D-Block\: Elements}}}}\star$

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Q-To find the Number of Group in D-Block Elements

$\bigcirc$Number of elements in D subshell -1+Number of electrons in S subshell

$\bigcirc$ Period number:

The Element has 3 as its quantum number

[tex]\implies[/tex]therefore it is 3rd period

$\bigcirc$D-Block Element

$\bigcirc$ In d subshell this element will have 3 electrons.

In s subshell this element will have 2 electrons

so by the Above given Trick :

(3-1)+2

$\implies$4

$\implies$i.e This Element belongs to 4th group

$\blacksquare$$\huge{\bold{\purple{\mathscr{((n-1)d electrons )+(n S electrons)}}}}$

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