Difference between bouyancy and density

ANSWER GURL

Explanation:

Buoyancy is the upward force that a fluid exerts on an object. Illustrations should use arrows to indicate the upward buoyant force on a floating object. 2. If the density of an object is less than the density of the surrounding fluid, the buoyant force of the liquid will cause the object to float

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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its first and third is your answer i did the qustion the fourth isnt right