O-18, an isotope of oxygen, has a stable nucleus. O-19, another isotope of oxygen, does not have a stable nucleus. Based on this information, which statement is correct? O-19 is radioactive; O-18 is not radioactive.
O-19 has a mass defect; O-18 does not have a mass defect.
O-19 has a nuclear binding energy; O-18 does not have a nuclear binding energy.
O-19 has more neutrons than protons; O-18 has equal numbers of neutrons and protons.

Find the mass, in grams, of 5.00*10^23 molecules of f2

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.

As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend? angle at which the ray strikes the medium color of the material density of the material temperature of the light wave