Which of the Following Is/are Correct Postulates of Bohr's Theory

question 21

Multiple Choice

Which of the following is/are correct postulates of Bohr's theory of the hydrogen atom ?
1.The energy of an electron in an atom is quantized (i.e. only specific energy values are possible) .
2.The principal quantum number (n) , specifies each unique energy level.
3.An electron transition from a lower energy level to a higher energy level results in an emission of a photon of light.

• A) 1 only
• B) 2 only
• C) 3 only
• D) 1 and 2
• E) 1, 2, and 3

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