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← ScienceWhich consequence results when electrons fail to perfectly shield the nucleus in heavy atoms impacting electron capture?
A)Forbidden reactions happen more readily✓
B)Alpha decay rates become faster
C)Neutron emission rates increase
D)Spontaneous fission reactions are suppressed
💡 Explanation
Weaker shielding increases the nuclear charge experienced by inner electrons. Electron capture increases because the effect enhances **quantum tunneling** through the Coulomb barrier. Therefore, electron capture becomes more likely, rather than alpha decay since that depends on more complex considerations.
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