WorksheetsModel of the Atom (Chapter 20&21)
Total questions: 30
Worksheet time: 32mins
An electron has a kinetic energy E and a de Broglie wavelength λ. The kinetic energy is increased to 4E. What is the new de Broglie wavelength?
λ/4
λ/2
λ
4λ
Wave -particle duality is supported by...
electrons behaving as particles with ordinary matter
electrons behaving as waves when travelling through space
the photo electric effect
all of the above
One quantum of light energy is called a (a)
The energy of a photon is directly proportional to the photon’s (a)
In the .........model of the atom, the .......... orbits correspond to different energy............
(a)
The branch of physics that is the general study of the micro-world of photons, atoms, and nuclei
Is called (a)
How much energy would it take to ionize an electron in the ground state?
1 eV
3 eV
7 eV
12 eV
Which transition would result in a photon with the largest wavelength?
From -1 to -12
From -3 to -7
From -7 to -12
From -1 to -3
Light is emitted by transitioning an electron form the 3rd to the second excited state of a hydrogen atom in the Bohr model. If the transition were from the n = 3 to the n = 1 level instead, the light emitted would have
lower frequency
longer wavelength
higher energy
larger amplitude
According to the Bohr theory, electrons in the the 4th energy level and eventually ending up in the ground state could produce a total of how many lines in the hydrogen spectra?
7
6
5
4
3
Which pair of transitions between two energy states En in a hydrogen atom would correspond to the emission of the atom with the longest wavelength?
E6 to E5
E5 to E4
E4 to E3
E3 to E2
Light having a continuous range of energies between 7-10 eV is incident upon a material with energy levels as shown. Which energies could be absorbed?
1, 2, and 3 eV
4, 5, and 9 eV
9 eV only
7 and 10 eV only
Light having a continuous range of energies between 7-10 eV is incident upon a material with energy levels as shown. Which energies could be emitted once the gas is hot?
1, 2, and 3 eV
4, 5, and 9 eV
9 eV only
7 and 10 eV only
Take a close look at the picture. What is this called?
the color of life
lucky charms
spectral line
electron cloud
Line emission spectra is produced from atoms when
electrons release energy as they move to their excited state.
electrons absorb energy as they move to their excited state.
electrons release energy as they return to the ground state.
electrons absorb energy as they return to the ground state.
The color of emitted light with lowest energy is
violet
green
red
indigo
When an electron moves from n=2 (energy level 2) to n=4 (energy level 4)
MULTIPLE ANSWERS: CHECK ALL CORRECT ANSWERS
it must absorb light
it will release light
it will move farther from the nucleus
it will move closer to the nucleus
A ground state electron is
freshly crushed into a fine powder.
in the highest possible energy level.
in the lowest possible energy level.
constantly emitting light.
What type of spectrum is shown?
emission
absorption
visible
photon
