The undersea mountain chain where magma rises from and where new ocean floor is produced is called?

mid-ocean ridges

Explanation:

Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor.

can you attach a picture of the lettuce? : )

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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