What is 6829 km expressed in scientific notation? a. 6.829 × 100 km b. 6.829 × 103 km c. 6.829 × 102 km d. 6.829 × 10-3 km

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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i think it is true since you can test the answer and can use observations to complete it.