Question

Why do ion lines predominate in spark spectra and atom lines in arc spectra?

Short answer

Ion lines predominate in spark spectra and atom lines in arc spectra because of very high temperature, which ultimately causes the element's ionization.

Step-by-step solution

Step 1. Given Information.

Give the reason why ion lines predominate in spark spectra and atom lines in arc spectra.

Step 2. The predominance of Ion lines.

Ion lines predominate in spark spectra because during emission analysis when there is the use of spark at very high voltage, the temperature is quite high around 40,000 K. The ionization energy is quite high at this temperature, which causes almost all the elements to undergo ionization. This led to the formation of ion lines in the spectra.

Step 3. Formation of Ion lines.

The ionization energy is quite high at this temperature, which causes almost all the elements to undergo ionization. This led to the formation of ion lines in the spectra.