How many atoms will there most likely be at the third half-life of potassium-40 in this model

At the 3rd half life there are 13 atoms remaining.

Explanation:

Initially we start with a model of potassium-40 atoms which has 50 atoms of it.

We have to find how many atoms would remain at the third half life.

A half life is the time duration with which the number of atoms reduce to half of it's initial number.

At the first half life 50 would reduce to it's half and only 25 would remain .

At the end of the second half life or the starting of the third half life there would be 12.5 atoms remaining. As we cannot express number of atoms as a decimal we round it off to 13.

The number of atoms = 13

they emit helium gas that attaches to nearby planets.

they remove low-mass elements from the planets’ crust.

they cause nuclear fusion inside the inner core of planets.

they produce heavy elements such as iron and gold.

explanation: