Question

What is lanthanide contraction ? Name an important alloy which contains some of the lanthanoid metals.

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Answer 1

Answer:

The steady decrease in the atomic and ionic radii (having the same charge) with increase in atomic number as we move across the series from lanthanum to lutetium is known as lanthanoid contraction.

Misch metal

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Answer 2

Answer:

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Explanation:

The steady decrease in the atomic and ionic radii (having the same charge) with increase in atomic number as we move across the series from lanthanum to lutetium is known as lanthanoid contraction.

An important alloy which contains some of the lanthanoid is misch metal. Misch metal consists of a lanthanoid metal (95%) and iron (5%) and traces of S, C, Ca and Al.