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What is the approximate wavelength of light emitted by C (yellow)?
a. 350 nm
b. 425 nm
c. 590 nm
d. 625 nm

What is the approximate wavelength of light emitted by CaCl2
(orange)?
a. 350 nm
b. 425 nm
c. 590 nm
d. 625 nm

What is the approximate wavelength of light emitted by KCl
(reddish-violet)?
a. 350 nm
b. 425 nm
c. 590 nm
d. 625 nm

What is the approximate wavelength of light emitted by NaCl
(yellow)?
a. 350 nm
b. 425 nm
c. 590 nm
d. 625 nm

What is the approximate wavelength of light emitted by LiCl
(reddish-violet)?
a. 350 nm
b. 425 nm
c. 590 nm
d. 625 nm