Iodine is 80% 1271, 17% 1261, and 3% 1281. Calculate the average atomic mass of iodine.

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays