Question

write some defects of long form of the periodic table​

Answer 1

Answer:

hey dear good evening,

Defects of the long form of the periodic table: (i) The position of hydrogen is still not clear although it is generally grouped with alkali metals. ADVERTISEMENTS: (ii) There is no place for lanthanides and actinides in the main body of the table.

Answer 2

Answer:

• position of isotopes
• he is not able to divide the table into metals and non metals
• he had not given the explanation of periodicity that why the elements repeat after several intervals