J. j. thomson a) electrons are in orbital levels. john dalton b) atoms are the smallest unit of an element. ernest rutherford c) electrons are scattered within the atom. niels bohr d) protons are at the center of an atom.

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.