Compression or sound waves behave a lot like transverse or electromagnetic waves compression waves exhibit all but one of following behaviors this is

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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i think   the answer is c hope i'm right

6.4 cm (max) - 25 cm (min)

fe 55.85 g/mol and h2o 18.02 g/mol.