Because all lanthanide's have almost similar physical as well as chemical properties.
Periodic table would be complex then. It will make study of elements difficult.
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Thulium is an lanthanide element with atomic number 69.
The lanthanide and actinide series. Trait of lanthanide: Lanthanum, element 57. Trait of actinide: actinium, element 89.
It is a lanthanide in period 6.
Periodic table would be complex then. It will make study of elements difficult.
its in the Lanthanide series
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No. Americium is an actinide.
Yes, lanthanide and Actinides are transition elements and they are specifically called inner transition elements.
Neodymium is a lanthanide.
57
15
The smallest atomic number and atomic weight for a lanthanide is lanthanum itself, element 57. The smallest atomic size is lutecium element 71; the lanthanides steadily decrease in atomic radius through the series, and the smallest is the last of them.
Separation of transition metals is difficult. They have similar size, occur together and difficult to separate.
They are used for making alloys
Earth