Question

write the Properties of f-block elements​

Answer 1

Answer:

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Answer 2

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i . Properties are similar to d block elements

ii. Electrons are added to f subshells of (n-2) level

iii. Placed between (n-1)d and ns block elements

Lanthanoids begin with atomic number 57 and end at 71. Although, historically, lanthanoids are termed as rare earth elements, they are fairly abundant in earth’s crust. For example, thulium is found more in abundance than silver (4.5 x 10^-5 vs 0.79 x 10^-5 percent by mass). The name rare earth elements was coined because of difficulty in extracting them economically in pure form from other lanthanoids having similar chemical properties. Now, due to newer separation methods like ion exchange resins, the separation of these elements has become easier and more economical.