The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state. The photon energy of the emitted photon is equal to the energy difference between the two states. There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum. Each element's emission spectrum is unique. Therefore, spectroscopy can be used to identify elements in matter of unknown composition. Similarly, the emission spectra of molecules can be used in chemical analysis of substances.
1. C
2. B
3. B
4. sorry, but we cant see the pictures. thats all I can do.
-Chad
Answer:
3km/h
Explanation:
Speed equal to distance /time
The potassium metal atoms occupying the crystal lattice that occurs is being held together by metallic boding
Answer:
high density
Explanation:
just got it right on edge