Warhead

ok, that its for natural elements, found in earth, but to obtain elements with higher atomic number from a natural element (maybe I am not explaining this right I will give it a try), for example when we do a fission with U-235 in Sr - 90 plus Xe - 143, we get normal elements, how do we get higher mass and atomic elements like artificial like Boris Z = 108 without fusion?

U cant actualy link ur elbow.

Hi everyone I am new to here, so here goes my first question! I have a question, how does scientists created elements like Plutonis, since in nuclear reactions are used with atoms with a lower atomic number than the artificial elements and using fission, how can scientists get elements with higher atomic number? PS: I am portuguese so all mine education is in portuguese, most of mine scientific vocabulary must be wrong but I think u will understand it