Respuesta :

ItzFeelBeat

[tex]\huge\underline\mathtt\colorbox{cyan}{A. Element L}[/tex]

Explanation:

Because the unidentified element has exactly the same Bright-Line Spectra of wavelength in nanometeres as does element L.

[tex]\huge\bold{\purple{\bold{⚡BeBrainly⚡}}} [/tex]

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