Question

Compare and contrart the
aviangement of elements in
Mendlen s periodic table and
Mosley's Modem periodic
table (anytive​

Answer 1

Answer: Mendeleev's periodic table                

                                                                                 

1. Elements were arranged in

increasing order of atomic  masses.  

2. There are 8 groups.

3. Each group is divided into subgroups a and b.  

4. The group for noble gases was not present, as noble gases were not discovered at that time.  

5. There was no place for isotopes.  

Modern periodic table :-

1. Elements are arranged in increasing order of atomic numbers.

2. There are 18 groups.

3. Groups are not divided into subgroups.

4. A separate group, i.e. group 18 is present for noble gases.

5. This problem was rectified, as slots are determined on the basis of the atomic number.

Explanation:pls mark me as the brainliest :)

Answer 2

Similarities between Mendeleev's periodic and Modern periodic table: Elements are arranged in groups and periods. Elements with similar properties are placed in the same group. Metals and non-metals are placed separately.

Explanation:

Hope it helps you dear...