What happens when you decrease the pressure from 150 kpa to 50 kpa on liquid water at 100 ºc?
a. the liquid water condenses.
b. the liquid water freezes.
c. the water remains liquid.
d. the liquid water vaporizes

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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