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6. An atom emits a photon when one of its orbital electrons
A. jumps from a higher to a lower energy level
B. jumps from a lower to a higher energy level
C. is removed by the photoelectric effect
D. is at rest
Explanation:
7. The potential energy of the electron in nth orbit of a atom is
A.
B.
C.
D.
Explanation:
8. The energy required to remove an electron from the second orbit of the hydrogen atom is
A. 13.60 eV
B. 3.40 eV
C. 1.51 eV
D. 2.00 eV
Explanation:
9. The nucleus of an atom consists of
A. positive charge
B. negative charge
C. both positive and negative charge
D. no charged particles
Explanation:
10. The radii of the Bohr’s orbit of hydrogen atom are proportional to
A. integer
B. square of integers
C. square root of integers
D. reciprocal of square of integers
Explanation:
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