J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.
Answer:
The excited state electron configuration of an atom indicates the promotion of a valence electron to a higher energy state.
<span>The ends of a bar magnet are called POLES</span>
An electron i hope this helps
