Subject: Why are the man-made elements so unstable?

    To whom it may concern:
                  My name is Jeremy Rees. I am in advance science in Mrs.  DeVane's science class at King Middle School. I live in Milton, Fl, in   American Farms. I am in the 8th grade and it is hard. We are studing   elements and atoms right now.
                  My question is, Why are the man-made elements so unstable? Also,why do they consider it an element if it don't last long enough to study?
                  Thank you for your time to anwser my question that I have asked you. I hope you anwser it for me because I like to study and learn about elements.
               
                                                                    Thanks again,
                                                                     Jeremy Rees

Re: Why are the man-made elements so unstable?