How do clastic sedimentary rocks form?

lava cools and hardens into rock.

plant and animal remains are squeezed and cemented together.

solid chemicals in water harden and form rocks.

fragments of rock are squeezed and cemented together.

a. they are both space stations

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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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