Compare and contrast the arrangement of elements in Mendeleev's periodic Table and the Modern Periodic Table. [5 MARKS]

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$\begin{matrix} M e n d e l e e v^{'} s p e r i o d i c t a b l e & M o d e r n p e r i o d i c t a b l e 1. E l e m e n t s a r e a r r a n g e d i n t h e & E l e m e n t s a r e a r r a n g e d i n t h e i n c r e a s i n g o r d e r o f & i n c r e a s i n g o r d e r o f t h e i r a t o m i c m a s s e s . & t h e i r a t o m i c n u m b e r s . 2. T h e r e a r e 8 G r o u p s . & T h e r e a r e 18 G r o u p s . 3. E a c h g r o u p s a r e s u b d i v i d e d i n t o s u b g r o u p^{'} a^{'} a n d^{'} b^{'} & G r o u p s a r e n o t s u b d i v i d e d i n t o s u b - g r o u p s . 4. G r o u p s f o r N o b l e g a s w e r e n o t p r e s e n t a s n o b l e & A s e p a r a t e g r o u p i s m e a n t f o r n o b l e g a s e s . g a s e s w e r e n o t d i s c o v e r e d b y t h a t t i m e . 5. T h e r e w a s n o p l a c e f o r i s o t o p e s . & T h i s p r o b l e m h a s b e e n r e c t i f i e d a s s l o t s a r e d e t e r m i n e d a c c o r d i n g t o a t o m i c n u m b e r . \end{matrix}$

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Compare and contrast the arrangement of elements in Mendeleev's periodic Table and the Modern Periodic Table. [5 MARKS]

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