Answers26-27 CFISD TX-Chemistry A CRThe Modern Atomic Theory

The Modern Atomic Theory Answers

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3

Which are aspects covered by Bohr’s atomic model?

A
Electrons can have a measured radius.
B
Higher orbits have lower energies.
C
Electrons exist between orbits.
D
Electrons do not have energy, the energy is determined by the orbit.
4

Describe how the Bohr model explains both of these observations.

Answer:

The Bohr model explains that electrons can occupy only specific energy levels. When electrons move from higher levels to lower levels, they emit light at wavelengths corresponding to the energy differences between the levels. Since each element has unique energy levels, each element produces a unique emission spectrum.

5

Did your answer include all of the following?

A
In the Bohr model, electrons can exist only in certain energy levels surrounding the atom.
B
When electrons jump from a higher energy level to a lower one, they emit light at a wavelength that corresponds to the energy difference between the levels.
C
The energy levels in each atom are unique.
6

Which statements are true of the electron cloud model? Check all that apply.

A
It is also known as the planetary model.
B
It is considered the modern atomic model.
C
It describes the probable locations of the electrons.
D
It describes the specific locations of the electrons.
7

Compare the modern (electron cloud) model of the atom with Bohr’s atomic model. Which of these statements describe the two models correctly? Check all of the boxes that apply.

A
Bohr’s model was replaced only because of its age.
B
Bohr’s model electrons cannot exist between orbits, but in the electron cloud model the location of the electrons cannot be predicted.
C
The modern model explains all available data about atoms; Bohr’s model does not.
D
The modern model is more widely accepted because it was proposed by more well known scientists.

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