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Why sometimes the electrons of an atom transfer to higher energy level​

User Zergski
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Answer:

According to Bohr, the amount of energy needed to move an electron from one zone to another is a fixed, finite amount. ... The electron with its extra packet of energy becomes excited, and promptly moves out of its lower energy level and takes up a position in a higher energy level. This situation is unstable, however.

User Mikael Jagan
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