Atoms with certain characteristics are radioactive. Which is least likely to be radioactive? O A. all atoms with an atomic number over 83 B. all atoms with twice as many neutrons as protons C. all atoms with an atomic number under 40 O D. all atoms with half as many neutrons as protons​

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Me with this and you will be marked brainliest

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).