to the sugar solution in step #1, teaspoon sugar, a small portion at a time and stir the solution to dissolve the sugar. at this point, you have added 1 teaspoon sugar.​

668900 atoms in total

The answer would be true

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.

Answerchemical;