The beach sands of Kerala is a source of minerals like monazite. Monazite is the source of Thorium. Monazite also contain Neodymium and Cerium. The metals Thorium, Neodymium and Cerium belong to which block of modern long form of periodic table ?
A) s - block B) p - block C) d - block D) f - block
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Due to the alpha decay of thorium anduranium, monazite contains a significant amount of helium, which can be extracted by heating. Monaziteis an important ore for thorium, lanthanum, and cerium. It is often found in placer deposits. India, Madagascar, and South Africa havelarge deposits of monazite sands.
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option C is correct D block
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