Physics: Atomic Physics

gold foil experiment

positively charged alpha particles are two protons into neutrons bound together emitted from the nucleus of atoms during radioactive decay.

A beam of alpha particles are fired at the thin sheet of

gold foil

most of the alpha particles ____ through the gold foil and somewhere deflected at large angles or even straight back

passes

due to the angles of deflection, Rutherford concluded that there must be a concentration of positive charge at the centre of the atom,like charges ___

repel

ernest rutherford

in 1911 conducted the famous gold foil experiment, discovering the nucleus and creating the planetary model of the atom

discovered the ___ nucleus of the atom

positive

atoms are mostly

empty space

proposed that electrons ___ the nucleus as planets orbit the sun; the planetary model of the stom

orbit

unable to determine why electron orbits that steadily decreased to loss of ____ caused by centripetal acceleration and electromagnetism concepts of physics.

energy

further experimentation by other scientist led to a more _____ and _____ atomic model

accurate, detailed