Answer 1.) Eu3+ ( Europium with charge of + 3 ) Answer 2.) Sn-188 with a -2 charge So, we know that 50 protons = the atomic mass= Sn (tin) Now, we have to find the atomic mass/ atomic mass= protons+neutrons/ plugin= 50 protons+ 68 neutrons= 118 amu (atomi mass unit) Then , we have 48 eletrons ( e-) - ( 50 protons ( positive chage ))= -2 charge! Final plugin: Sn-188 with a -2 charge.
