Question

Modern and Mendeleev' s periodic table distinguish between

Answer 1

Modern and Mendleev's Periodic table
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Mendleev's
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According to Mendeleev's periodic law the physical and chemical properties of elements are periodic function of their atomic weights.

Important contributions of Mendeleev's periodic table are systematic study of the matter elements, correction of atomic masses and prediction of new elements like gallium (eka-almimunium), Germanium (eka-galiium ).

Modern Periodic table
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the Modern Periodic Table is also known as the long form of the periodic table this is constructed on the basis of repeating electronic configuration of elements.

By this Law physical and chemical properties of the elements are the periodic function of their atomic numbers .

Answer 2

Answer:

• Mendeleev's periodic table

1. elements are arranged in increasing order of their atomic masses.
2. It is not divided into any blocks.
3. There are 8 groups.
4. Isotopes could not be placed properly.

• Modern periodic table

1. Elements are arranged in increasing order of their atomic numbers.
2. It is divided into four blocks, namely s-block,p-block,d-block and f-block.
3. There are 18 groups.
4. Isotopes occupy the same position as the element.

Hope you understood mate!!!