What change will occur in atomic number if one β-particle is emitted from ²³⁵₉₂U?
WBBSE
Class X
Physical Science
Atomic Nucleus
01 Mark
2025
The atomic number increases by 1.
Explanation
During β⁻-decay, a neutron changes into a proton, emitting a β-particle (electron) and an antineutrino.
_0^1n \rightarrow _1^1p + _{-1}^0\beta + \bar{\nu}As a result:
- Atomic number increases by 1.
- Mass number remains unchanged.
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