it was created by fusion during early part of the big bang. it is everywhere hydrogen is.
Yes, we exist in this universe.
Yes. There are isotopes of elements that are simply not found anywhere in the universe (and even if they did exist momentarily, their lifetime is so short that in the next moment they would have decayed into a different more stable isotope).
Any isotope of uranium is specific. This notion don't exist.
Yes. it is an isotope of the element carbon and has 6 protons, 6 electrons and 7 neutrons.
The most important is carbon-12.
Not naturally,but yes they do exist.
The isotope plutonium-210 doesn't exist.
There is only one abundant isotope of fluorine and that is 19FFluorine-19 is the most common isotope, its abundance is classed as 100% because no other Fluorine isotopes exist in significant quantities. It is also the only stable Fluorine isotope.
In the Universe
The motto of Incredible Universe is 'If it's not in the Universe, it doesn't exist!'.
I believe it's because with out them , the universe wouldn't exist.. Meaning , We wouldn't exist..
There is no such isotope. The highest atomic number is 118. The question is erroneous. The isotope platinum-190 has the atomic number 78, the mass number 190 and the atomic mass 189,959 932(6).