How many different elements appear in the decay chain? does this match your original prediction? list the elements and explain your answer.
my prediction was 20 isotopes

The chain shows a list of elements in order of decreasing atomic number. The different elements can vary from the original element that first decayed down to the most radioactive element.

Explanation:

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.