C. The mass number is the amount of Protons and electrons there are combined, so 200 - 80 is 120.
The answer is 123
Brainliest??
And so what are you trying to ask or are you making a statement??????????????!☺☺☺
Answer:
25,272
Explanation:
Multiply 9.0 x 108 = 972
Multiply 3.0 x 10 = 30 - 4 = 26
Lastly, multiply 972 x 26= 25,272
