Question

# Decrease in atomic number is observed in :

A
α-emission
B
β-emission
C
positron
D
electron capture

Solution

## The correct options are A $$\alpha$$-emission B positron C electron captureEmission of an $$\alpha$$-particle, $$^{298}_{92}U\rightarrow {^{234}_{90}Th}+{^{4}_2He}$$ ($$\alpha$$-particle)Emission of positron, $$^{13}_7N\rightarrow {^{13}_6C}+{^0_{+1}e}$$K-electron capture, $$^{194}_{79}Au+e^0_{-1}\rightarrow {^{194}_{78}Pt}$$.Hence, option A, C and D are correct.Chemistry

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