Why transition elements are called rare earth elements?
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because transition elements show different properties ,slightly different than those of other blocks there property is in between of elements present right and left of periodic table.
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transition earth metal are called rare earth metal because they r not common
ef: arsenic is a highly poisonous metal but found under earth and is NOT very common
ef: arsenic is a highly poisonous metal but found under earth and is NOT very common
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