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WorksheetsFlame Test Lab Assessment
Total questions: 15
Worksheet time: 8mins
What was the identity of the unknown substance?
Cu2+
Sr2+
Ba2+
Ca2+
What color is the lowest energy in the EM Spectrum?
violet
blue
orange
red
What color is the highest energy in the EM Spectrum?
violet
blue
orange
red
How do electrons become "excited"?
release of heat or energy
absorption of heat or energy
What are packages of light energy called?
photons
electrons
protons
neutrons
Each element emits a characteristic pattern of light energies, called the _____ _____, which is useful for identifying the element.
emission spectrum
rainbow
electron pattern
light energy
Electromagnetic waves vary in
the speed they travel in a vacuum
wavelength and frequency
the way they reflect
the orientation of their electric and magnetic fields
The full range of frequencies of electromagnetic radiation is called
visible light
radio waves
the electromagnetic spectrum
invisible radiation
The waves with the longest wavelengths in the electromagnetic spectrum are
Infrared rays
radio waves
gamma rays
X-rays
Which has the SHORTEST wavelength and, therefore, the highest frequency / most energy
radio waves
ultraviolet rays
gamma rays
Which section of the spectrum can humans perceive with the naked eye?
visible light
gamma rays
ultraviolet rays
Which scientist is best known for his "Plum Pudding" model of the atom? His is credited for discovering the electron.
Niels Bohr
Which scientist proposed that electrons were arranged on fixed orbits around the nucleus?
J.J. Thomson
Ernest Rutherford
John Dalton
Niels Bohr
Which scientist proposed the first widely accepted atomic theory model? His view of the atom was a solid, invisible sphere.
John Dalton
Aristotle
Democritus
James Chadwick
