1. For each of the following numbers, by how many places must the decimal point be moved to express the number in scientific notation?
II. For each number, will the exponent be positive, negative, or zero?
0.0000089911

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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