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Physics
Physics
Problem
Consider the incomplete nuclear equation
53
131
I
⟶
54
131
Xe
+
e
−
+
?
^{131}_{53}\text{I} \;\longrightarrow\; ^{131}_{54}\text{Xe}+e^{-}+\;?
53
131
I
⟶
54
131
Xe
+
e
−
+
?
Which particle best completes the equation while satisfying all conservation laws? a) a positron
(
e
+
)
(e^{+})
(
e
+
)
b) an electron antineutrino
(
ν
ˉ
e
)
(\bar{\nu}_e)
(
ν
ˉ
e
)
c) an electron neutrino
(
ν
e
)
(\nu_e)
(
ν
e
)
d) a
γ
\gamma
γ
photon
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