Atomic Structure
Q. Which of the following statements about the Bohr model of the atom is correct?
-
A.
Electrons can exist in any orbit
-
B.
Electrons emit radiation in stable orbits
-
C.
Energy levels are quantized
-
D.
All orbits are elliptical
Solution
In the Bohr model, energy levels are quantized, meaning electrons can only exist in specific energy states.
Correct Answer: C — Energy levels are quantized
Learn More →
Q. Which of the following statements about the Bohr model of the hydrogen atom is correct?
-
A.
Electrons can exist in any orbit
-
B.
Only certain orbits are allowed
-
C.
Electrons radiate energy continuously
-
D.
The nucleus is positively charged
Solution
In the Bohr model, only certain orbits (or energy levels) are allowed for electrons, which correspond to specific energy states.
Correct Answer: B — Only certain orbits are allowed
Learn More →
Q. Which of the following statements is true regarding isotopes?
-
A.
They have the same number of protons
-
B.
They have different chemical properties
-
C.
They have different atomic numbers
-
D.
They have the same mass number
Solution
Isotopes of an element have the same number of protons but different numbers of neutrons, leading to different mass numbers.
Correct Answer: A — They have the same number of protons
Learn More →
Q. Which of the following transitions in a hydrogen atom would emit the highest energy photon?
-
A.
n=2 to n=1
-
B.
n=3 to n=2
-
C.
n=4 to n=3
-
D.
n=5 to n=4
Solution
The transition from n=2 to n=1 emits the highest energy photon as it involves the largest energy difference.
Correct Answer: A — n=2 to n=1
Learn More →
Q. Which quantum number describes the orientation of an orbital?
-
A.
Principal quantum number
-
B.
Azimuthal quantum number
-
C.
Magnetic quantum number
-
D.
Spin quantum number
Solution
The magnetic quantum number describes the orientation of an orbital in space.
Correct Answer: C — Magnetic quantum number
Learn More →
Showing 31 to 35 of 35 (2 Pages)
