WorksheetsBright Line Spectra and Electrons
Total questions: 26
Worksheet time: 2hrs 10mins
True or False: The ground state is the highest energy state of an atom.
True
False
What is the light that you can see called?
observatory light
ultraviolet light
visible light
infrared light
All stars are composed of a mixture of elements. When these elements are heated they emit specific amounts of electromagnetic radiation, known as an emission spectrum. Each element emits a unique, identifiable, spectrum.
Using the Bright-line emission spectrum chart below, identify the elements present in this modeled star (found in the line labeled “mixture”).
Lithium and cadmium are in the mixture. Strontium is not in the mixture.
Lithium and strontium are in the mixture. Cadmium is not in the mixture
Cadmium and strontium are in the mixture. Lithium is not in the mixture
All of the shown elements are present in the mixture.
The unknown emissions spectra belongs to the element
Hydrogen
Mercury
Neon
Sodium
The unknown emissions spectra belongs to the element
Hydrogen
Mercury
Neon
Sodium
The picture shows an atom in the ground state absorbing energy and the electron jumps to the excited state. Which state has higher energy?
Ground State
Excited State
Each element produces its own pattern of emission spectra lines because each element has its own distinct
Speed of light
Electron configuration
Number of neutrons
None of these
The unknown emissions spectra belongs to the element
Hydrogen
Mercury
Neon
Helium
When atoms _____________ energy, their electrons move to higher energy levels. These electrons _____________ energy by emitting light when they return to lower energy levels.
lose, absorb
absorb, lose
lose, lose
absorb, absorb
Emission spectra (bright line spectra) are created when electrons move from ___.
higher to lower energy levels.
lower to higher energy levels.
s orbitals to p orbitals.
one atom to a different atom.
When electrons of an element reach an "excited" state, ___ lines are produced.
dark
emission (bright)
continuous
invisible
Each element on the periodic table can be identified by its
classification as a solid, liquid or gas.
location on the table.
ability to react to form compounds.
unique spectral "fingerprint."
Emission spectra emitted by an element (or compound) will produce ___ through a spectroscope.
bright lines
a continuous rainbow
dark lines
white light
In which state does an electron have the least amount of energy?
Excited state
Ground state
Orbital
Bohr model
In the electron cloud model of the atom, what does the cloud represent?
the limits of the electron location
the probability of the electron location
the average distance between the electron and the nucleus
the minimum distance between the electron and the nucleus
Flame tests can be used to identify an element. Each element emits characteristic waves of light when it is heated in a flame. What describes how the light is produced?
Protons in the ground state lose energy and give off light.
Protons in the ground state gain energy and are emitted from the nucleus, giving off light.
Electrons in the ground state lose energy and move to an excited state, giving off light.
Electrons in the ground state gain energy, move to an excited state, and give off light when they return to the ground state.
Which is a possible excited state for an element?
2-8-8-2
2-8-18-8-2
2-7-8-3
2-8-18-8-3
Which is the ground state configuration for Cobalt?
2-8-15-2
2-8-17
2-8-16-1
2-8-9-8
What is the excited state electron configuration of Sodium, Na
1
2-8-1
2-7-1
2-7-2
