The element symbol for uranium-238 is 23892U. This means U-238 has a total mass of 238 and contains 92 protons. Match the element symbols for the isotopes below. 11H Answer 1 Choose... 31H Answer 2 Choose... 126C Answer 3 Choose... 146C Answer 4 Choose... 23892U Answer 5 Choose... 23592U Answer 6 Choose...