Each element have different energy level orbital, due to which, electron movement from one orbital to another is different for each element. As the wavelength of emitted radiations depends on the difference between the energy level of these orbital and so the line spectra, that’s why different elements have different line spectra.
Yes, the element will emit the same line spectrum if a different excitation source is used. The energy orbital (in which the electron revolve) are fixed in an element. The electron at lower energy orbit will take some specific amount of energy (irrespective of, it is coming from electricity or flame) and go to some higher orbit. And on return will emit the same energy in the form of photon of particular wavelength.
When the light is passed through an element, the element absorbs certain wavelengths while the rest of the wavelength pass through it. This spectrum is called absorption spectrum. The absorb wavelength appear as bright while the background is bright.
No, there is no ambiguity in determining the identity of the unknown as there are very less chance (negligible) that spectral lines of any two compounds match. The contamination of dust particles over the unknown is the most problematic error that can occur.
Octadecene is a hazard chemical. Its vapor should not be inhaled, and contact with skin and eyes should be avoided. Trioctylphosphine is a corrosive chemical and it causes burns. Oleic acid is a very light and heat sensitive. It is irritating to eyes, the respiratory system, and the skin.
The safety precautions that should be taken are Wearing gloves and eye protection. Working should be done in fume hood environment and care should be taken in handling reagents. The disposal of waste should be proper.
2. (1 pt.) Your group should be ready to add the selenium solution to the cadmium solution as soon as the temperature reaches 225◦ C. What experimental difficulties arise of the cadmium heats