The approximate astronomical distance between Earth (in the Milky Way Galaxy) and the Andromeda Galaxy is 2.5 million .

A. AUs
B. parsecs
C. kilometers
D. light-years

Your answer would be D.

Explanation:

Your answer would be D.

Explanation:

b i think it’s a water wheel turning in a stream

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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