I need help with all of these questions. I’m not very good in the chemistry department, and I’m struggling to understand this unit. If you can help me it would be greatly appreciated.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block

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