The spectrum for visible wavelengths emitted by Star X is compared to the emission spectra of four different elements. According to the spectral analysis data, which element is present in Star X?
Spectrum of Star
Spectrum of Star X
ULIT
Spectrum of Hydrogen
Spectrum of Carbon
Spectrum of Star X
Spectrum of Star X
Spectrum of Neon
Spectrum of Magnesium

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

gas

explanation:

smoke is the matter of a gas