NEET 2022, Physics Q28: Radioactivity

NEET2022Physics

In the given nuclear reaction, the element X is:

$_{11}^{22} Na \to X + e^{+} + υ$

Solution

The reaction emits a positron and a neutrino, so this is $β^{+}$ decay.

In $β^{+}$ decay, the mass number stays the same while the atomic number drops by 1.

Starting with $_{11}^{22} Na$ , the daughter nucleus is $_{10}^{22} Ne$ .

Concept behind this question

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