68
68. Element with atomic number 58 belongs to which group and block of periodic table respectively
(1) 3rd, d-block (2) 3rd, f-block
(3) 4th, f-block (4) 6th, d-block
Dear student,
According to periodic table Lanthanum (La) which is a d-block element has atomic number 57. After this the electron starts filling in the "f" subshell. All the f-block elements are present in IIIB group or 3rd group.
Hence the answer is (2)
Hope it helps
Regards
According to periodic table Lanthanum (La) which is a d-block element has atomic number 57. After this the electron starts filling in the "f" subshell. All the f-block elements are present in IIIB group or 3rd group.
Hence the answer is (2)
Hope it helps
Regards