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When radioactive substance emits an alph...

When radioactive substance emits an `alpha-`particle, then its position in the periodic table is lowered by.

A

One place

B

Two places

C

Three places

D

Four places

Text Solution

Verified by Experts

The correct Answer is:
B
As `""_(Z)X^(A) overset(alpha)rarr ""_(Z-2)Y^(A-4)`
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