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If the atomic number of lithium is 3, th...

If the atomic number of lithium is 3, then the atomic number of francium will be

A

87

B

86

C

85

D

84

Text Solution

Verified by Experts

The correct Answer is:
A
Atomic number of Fr (element of 7 th period ) is `3+8+8+18+18+32=87`.
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