A). polonium is a rare element with 33 radioisotopes. the most common one, 210po, has 82 protons and 128 neutrons. when 210po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. they can be stopped by, for example, a sheet of paper or a few inches of air. that is one reason that authorities failed to discover toxic amounts of 210po in the body of former kgb agent alexander litvinenko until after he died suddenly and mysteriously in 2006. what element does an atom of 210po change into after it emits an alpha particle?
b). some undiluted acids aremore corrosive when they are diluted with water. that is why laboratory workers are told to wipe acid splashes with a towel before washing with a copious amounts of water. explain.