what are rare earth metals? another name for rare earth metals?

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Solution

These are present in 6th period of periodic table. The lanthanide series consists of a total of 14 elements from (Cerium) ₅₈Ce to (Leutetium) ₇₁Lu. They are also called as lanthanoids or rare earth elements as they occurs scarcely in the earth's crust.
In general, their outermost

Electronic configuration is 4f¹– 14 6s²
Due to lanthanoid contraction, there is a gradual decrease in atomic and ionic radii with increase in
atomic number.
The lanthanoids exhibit mainly +3 oxidation state. However, sometimes +2 and +4 oxidation states
are also exhibited.

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Similar questions

19. With reference to rare earth material reserves,

1. India has the highest reserves of rare earth materials. But China is the largest producer of these elements.

2. Rare earth metals are essential for the manufacture of various kinds of electronic items and there is growing demand for these elements.

Identify the correct statement/s using the codes given below:

M {(O H)}_{3}

4.32 \times 10^{- 14}

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