anonymous
  • anonymous
Which of the following represents positron emission? Select one: a. 3015P ---> 3014Si + ___ b. 23892U ---> 23490Th + ___ c. 147N + 42He --->178O + ___ d. 23490Th ---> 23491Pa + ___
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@abb0t
abb0t
  • abb0t
It might help if you knew what \(positron~emission\) meant. So I ask, do you know what that means? :)
anonymous
  • anonymous
Positron emission is a byproduct of a type of radioactive decay known as beta plus decay. According to wiseGEEK.com :P

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abb0t
  • abb0t
HINT: you're releaseing a positron.
abb0t
  • abb0t
Well, yes it's a \(\beta^+\)-decay, but do you know what that actually means? Lol.
anonymous
  • anonymous
A positron is an anti-electron: it has the same mass, but has a +1 change instead of a -1 charge. The remaining nucleus has one less proton and one more neutron
abb0t
  • abb0t
Yep, so what that means is that a proton inside a radionuclide nucleus is converted into a neutron. Does that make sense?
anonymous
  • anonymous
Somewhat, I'm not quite sure how that applies to the question above. :)
anonymous
  • anonymous
so you are decreasing the atomic number by one.
abb0t
  • abb0t
You're losing a positron. Which means -1 Do you know the notation? What it means when you have for instance, \(_{12}^{23}Mg\)??
abb0t
  • abb0t
Yes, correct!!
anonymous
  • anonymous
is it a?? :P
abb0t
  • abb0t
Correct.
anonymous
  • anonymous
Yay! Thank you so much @abb0t! :)
anonymous
  • anonymous
No worries! It's better for all of us in the long-run! :)

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