Question

Write the 5 advantages and disadvantages of modern periodic table?

Answer 1

* Advantages:-

1. This classification is based on the atomic number which is a more fundamental property of the elements.
2. Since this classification is based on the atomic number and not on the atomic mass, the position of placing isotopes at one place is fully justified.
3. It is easy to remember and reproduce.
4. The systematic grouping of elements into four blocks; s, p, d and f has made the study of the elements more simple.
5. The position of some elements which were misfit on the basis of atomic mass is now justified on the basis of atomic number. For example, argon precedes potassium because argon has atomic number 18 and potassium has 19.

* Disvantages:-

1. Hydrogen resembles both the alkali metals and halogens But it has been placed with the alkalis.
2. The lanthanides and actinides have not been placed in the main body of the table.
3. Place of Multivalent elements is not sure in the modern periodic table.