Answer
Answer:
(a): The number of protons = 88, the atomic number of radium
(ii): The number of neutrons = 228 - 88 = 140
(iii): 2+ means that it has lost 2 e- from the neutral atom in which e- = p = 88
So there are 88 - 2 = 86 e- in this ion
(b): 228.030/(15.9949 ) = 14.2564.
Work Step by Step
Answer:
(a): The number of protons = 88, the atomic number of radium
(ii): The number of neutrons = 228 - 88 = 140
(iii): 2+ means that it has lost 2 e- from the neutral atom in which e- = p = 88
So there are 88 - 2 = 86 e- in this ion
(b): 228.030/(15.9949 ) = 14.2564.