Question

what are lanthanides and actinides in modern periodic tables​

Answer 1

Answer:

Third group and sixth and seventh period respectively.

Explanation:

GIVEN :

What are lanthanides and actinides in modern periodic table?

SOLUTION :

lanthanides include elements 58 to 71 ( 4f subsheel). Actricdes include elements are 89 to 103 (5f subsheel). Inner transition metals are located at the bottom, seperated from the rest. They all fell the f-block..

lanthanides and actinides are third group and 6th and 7th.PERIOD RESPECTIVELY.