An element of nucleon number P and atomic number Q emits an alpha particle from...

WAEC 2014

An element of nucleon number P and atomic number Q emits an alpha particle from its nucleus. The resultant numbers of the new element formed are respectively

A. P - 4 and Q + 2
B. P - 4 and Q - 2
C. P + 2 and Q + 2
D. P + 2 and Q - 2

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Correct Answer: Option B

Explanation

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