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Question Number 31863 by Tinkutara last updated on 16/Mar/18

Commented by rahul 19 last updated on 16/Mar/18

$(3) ?$
Commented by Tinkutara last updated on 16/Mar/18
�� but why?
Commented by Tinkutara last updated on 16/Mar/18
But how 3rd is correct? In which book I can read this explanation?
Commented by rahul 19 last updated on 16/Mar/18

$t h e o n l y t h i n g w h i c h c o m e s t o m y$ $m i n d a f t e r s e e i n g^{'} d^{'} i s l a n t h a n i d e c o n t r a c t i o n .$
Commented by Tinkutara last updated on 16/Mar/18
But why not 2nd? In a group this condition holds.
Commented by rahul 19 last updated on 16/Mar/18

$i c h o o s e m o r e a p p r o p r i a t e o p t i o n .$ $a n d y e s w e a l r e a d y k n o w (2) o p t i o n$ $a n d {t h a t}^{'} s h o w t h e p e r i o d i c t a b l e$ $i s m a d e!$
Commented by rahul 19 last updated on 16/Mar/18

${t h a t}^{'} s p r e s e n t i n j d l e e i t h i n k .$
Commented by Tinkutara last updated on 16/Mar/18
Do you know where in it?
Commented by rahul 19 last updated on 16/Mar/18

$i a m n o t s u r e t h o u .$ $e v e n i h a v e t o c h e c k . a c t u a l l y i t w a s$ $t o l d b y m y t e a c h e r w h e n w e w e r e$ $d o i n g p e r i o d i c c l a s s i f i c a t i o n .$
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