Element A decays to Element B with a half-life of 4 years. After 12 years, how
many half-lives have passed? (SPS4b)
2
1
3
4

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

If 1.8 l of water is added to 2.5l of a 7.0 molarity koh solution, what is the molarity of the new solution

Apush or pull that moves or changes and object when to objects touch