${24}_{Na}$ নিউক্লিয়াসটি ক্ষয়প্রাপ্ত হয়ে ${24}_{Mg}$ নিউক্লিয়াস পরিণত হয়। এখানে কী ধরনের কয় হচ্ছে?

The answer $\beta$-ক্ষয় is correct because the question describes a nuclear decay process where a nucleus, specifically the isotope ${24}_{Na}$, transforms into another nucleus, ${24}_{Mg}$.
This type of decay indicates that a neutron is converted into a proton while emitting a beta particle (β), which is characteristic of beta decay. In beta decay, the atomic number of the nucleus increases by one, which is consistent with the transformation from Na to Mg without changing the mass number.
Here are the key points:

    
• Beta decay (β- decay): Involves the conversion of a neutron into a proton and the release of a beta particle.
    
• This process results in a change of the element (from sodium to magnesium) while the mass number remains the same.

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