An element with two isotopes has a tabulated atomic mass of 119.21u. One of the isotopes has a mass of 117u. What is likely to be the mass number of the second isotope?

Acar tire has a pressure of 2.38 atm at 15.2 c. if the pressure inside reached 4.08 atm, the tire will explode. how hot would the tire have to get for this to happen? report the temperature in degrees celsius.

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Which of the following is a physical property flammability heat of combustion solubility and toxicity