316
227-89 = 138
316 - 89 = 227
Actinium (Ac) Atomic Number: 89 Atomic Weight: 227 Protons: 89 Electrons: 89 Neutrons: 138 -----(227-89=138)
The sum of 89 is simply 89 itself, as it is a single number. If you are asking for the sum of multiple instances of 89, you would need to specify how many instances there are. For example, the sum of two instances of 89 would be 178.
224 rn 86
It is: 27+89 = 116
Actinium (Ac) Atomic Number: 89 Atomic Weight: 227 Protons: 89 Electrons: 89 Neutrons: 138 -----(227-89=138)
70 + 19 = 89 or: the sum of 70 and 19 is 89
67 + 89 = 156
34.6 + 89 = 123.6
100
89 + x = x +89