For some forces, if you a medium (barrier) is placed in between two atoms or objects, the force gets weaker. Which law is medium dependent and has a weaker force if there is a medium between the two atoms? A. Newton’s Law of Gravitation
B. Coulomb’s Law
C. Magnetic Field
D. Electric Field

Which of these conditions most likely produces an unstable isotope?

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)

State one important difference between a physical change and a chemical change?