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Some characteristics about an unknown el...

Some characteristics about an unknown element in the periodic table are known. Which of these elements best fits the observations given:
(A) Its density is 21 `g//cm^3`
(B) It has an outer configuration of `[Xe] 4f^14""5d^5""6s2`
(C) It is silvery white and shows an oxidation state of (+7)

A

Re

B

Ce

C

Zn

D

Se

Text Solution

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The correct Answer is:
A
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