How many molecules of nitrogen dioxide are in 1.28 g of nitrogen dioxide?

What element is in the lathanide family?

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.