Is pottasium-15 isotope possible?

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I can't find isotope, pottasium-15 or k-15. Is this even possible, I have a fill-in-the-blanks worksheet with a table like example:

Element Name: Nitrogen-20 Symbol: N-20 Atomic Number: 7 Atomic Mass: 20 Charge: 0 Protons: 7 Neutrons: 13 Electrons: 7

I remember finding the isotope number, Nitrogen-20 by adding the Protons and Neutrons, then a new atomic mass. But on here Pottasium-15 is confusing! What neutrons do I add from 19 protons to get 15? Sometimes the teacher throws in impossible problems

Nov 22nd, 2015

Thank you for the opportunity to help you with your question!

yes its is possible  Number of  protons number of neutrons

34K191533.99841 Isotopic mass
  Number of protons 19  number of electrons 19  number of neutrons 15

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 22nd, 2015

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Nov 22nd, 2015
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Nov 22nd, 2015
Sep 26th, 2017
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