Nancy placed 20 drops of 1M HCl into a test tube, and then placed 20 drops of 3M HCl into a second test tube. She then cut a magnesium strip into 1 cm strips. She placed a strip into each test tube at the same time. Which
test tube should she expect for the magnesium to react faster and ultimately disappear first? Explain your
answer.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.