Element X has two stable isotopes, X-203 and X-205. X-203 has a molar mass of 202.9723 g/mol and a relative abundance of 29.52%. X-205 with an abundance of 70.48% has a molar mass of 204.9744 g/mol.
What is the average atomic mass of X?
How many protons, electrons and neutrons are in S-33 with a charge of -2?