Answer:
A. The sum of all the forces acting on an object.
Research has shown that the electrons orbit the nucleus in circular motions as shown on the classic Bohr model. FALSE
After 4 half-lives, there was 1 gram.
1 half-life earlier, after 3 half-lives, there must have been 2 grams.
1 half-life earlier, after 2 half-lives, there must have been 4 grams.
1 half-life earlier, after 1 half-life, there must have been 8 grams.
1 half-life earlier, when it started decaying, there must have been 16 grams. <em>(B) </em>
may i ask your answer soloutions... and i believe that the correct answer is mass
