Question

What are inner transition elements ? how they do differ from transition element?

Answer 1

These INNER TRANSITION ELEMENTS are the elements in periodic table which are located in the bottom of modern periodic table

These are also called as f-block elements

Transition metals and inner transition metals appear to be similar in the way they are categorized on the periodic table, but they have significant differences in their atomic structure and chemical properties. The two groups of inner transition elements, actinides and lanthanides, behave differently from each other as well, even though they are both considered rare earth elements.

Answer 2

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.