identify the isotope that has atoms with 12
neutrons, 10 protons, and 10 electrons.
1. 12al
2. 10s
3. 10p
4. 12mg
5. 22ne
6. none of these
7. 22na

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3