Question

the number of incompletely filled shells in d block is x and f block is y. Then x+y is​

Answer 1

Answer:

14 elements from atomic number 58 (Cerium) to 71(Lutetium) are called as Lanthanides and the another 14 elements from atomic number 90 (Thorium) to 103(Lawrencium) are called as Actinides. These 28 elements are arranged in the 2 series placed below the Modern Periodic Table and the elements in these 2 series are collectively called as f-block elements. These elements have outermost three shells incomplete. Option D is correct answer.

Answer 2

Answer:

the answer to this question is 7