Answer: According to the Bohr model, atoms emit light because excited electrons are returning to lower energy states, emitting the energy difference. This energy always has a specific wavelength because the electrons can only exist in set orbits. ... An emission spectrum is the frequencies of light emitted from an atom.
Explanation:
C) Fluorine is the most reactive among halogens
The answer is C. Elastic potential energy
Ice is less dese than water
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