According to the model of the atom hypothesized by neils bohr, where can electrons be found around an atom's nucleus? a. any distance away from the nucleus. b. at fixed distances away from the nucleus. c.inside and outside of the nucleus. d. bundled together as a separate negatively charged nucleus bonded to the positively charged nucleus.

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

What happens to an isotope during radioactive decay?

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic