electronic configuration of inner transition elements
Answers
Explanation:
The f block elements, numbers 57 to 70 and 89 to 102, are called the inner transition elements because of their placement in the periodic table due to their electron configurations. ... Thus, the electron configuration for Nd (Z=60) is [Xe] 6s2 4f4. The last electron goes into a 4f orbital which is inside the 6s orbital.
Answer:
Explanation:
(i) Elements placed in two separate rows at the
bottom of the periodic table are called inner
transition elements.
(ii) They include two series of elements: Lanthanide
series and Actinide series. They belong to f-block
elements of Modern Periodic table.
(iii) 14 elements with atomic number 58 to 71
(Cerium to Lutetium) are called lanthanides.
These elements are placed along with lanthanum
(La = 57) in group 3 and period 6 because of very
close resemblance in properties between them.
(iv) 14 elements with atomic number 90 to 103
(Thorium to Lawrencium) are called actinides.
These elements are placed along with actinium
(Ac = 89) in group 3 and period 7 because of very
close resemblance in their properties.
(v) They have last three shells incompletely filled.