As a wave and also as a particle. This was proposed by Einstain and it is a theory.
Answer:
A. True
B. True
C. False
D. False
Explanation:
Electrons travel around the nucleus in circular orbits and moves from one orbit to another orbit when they absorb energy or lose energy. The Bohr atom is the model currently accepted for electrons in atoms because this model provides the right information about presence of electrons around the orbits. Scientists know the energies of electrons as well as the areas (orbitals) where the electrons are probably located with the help of new technology.
I think the answer is 60. My atomic number was 78 and the number of electrons was the same number as the atomic number. -Link