Niels+Bohr

Niels Bohr [] [|www.kentchemistry.com/links/AtomicStructure/Bohr.htm] Based on the two videos, explain the major flaws of Rutherford’s model of the atom.

Summarize Bohr’s model of the atom: //His theory was that electrons travel only in certain successively larger orbits. He suggested that the outer orbits could hold more electrons than the inner ones, and that these outer orbits determine the atom's chemical properties//.

Compare and contrast his model to Rutherford’s model. //According to Rutherford's model, negatively charged electrons may move and orbit anywhere around the positively changed nucleus. The electrostatic attraction between the and the nucleus was linked to the gravitational force of attraction. This helped him make an inference of scattered electrons around the nucleus which is called electron clouds. He also confirmed the existence of proton in his model. Later, Bohr gave Rutherford's model a shell structure in which electrons correspond to specific orbits. then he suggested that the outer orbits could hold more electrons than the inner ones, and they determine the atom's chemical properties. He made restrictions to these movements of electrons by imposing pictures of electons around the nucleus in that orbit. He determined that an atom has specific, allowable energy levels called stationary states in which electrons take up a fixed circular orbit around the nucleus.//



What new knowledge did we gain?

What was wrong with Rutherford’s model? Did any of Rutherford’s ideas continue to be valid? //Bohr's atom is used as a symbol for atomic energy. It is like the solar system because the nuetrons and protons are in the center called the nucleus, which would be the sun. Then the electrons orbit around the nucleus like plants around the Sun would//.

Summarize Bohr’s concept of electrons absorbing and emitting energy:

Bohr predicted that the electrons travel throughout an atom at a certain distance from the nucleus based on the energy levels of the electron. Electrons don't lose any energy when they travel, they just change when energy occurs by jumping from one level to another, which causes them to absorb electromagnetic radiation.