Q. The uncertainty principle is associated with which of the following scientists? (2023)
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A.
Bohr
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B.
Heisenberg
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C.
Schrodinger
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D.
Planck
Solution
The uncertainty principle is a fundamental concept in quantum mechanics formulated by Werner Heisenberg.
Correct Answer: B — Heisenberg
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Q. What is the maximum number of electrons that can be accommodated in the d subshell? (2019)
Solution
The d subshell can hold a maximum of 10 electrons.
Correct Answer: C — 10
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Q. What is the maximum number of electrons that can be accommodated in the p subshell? (2023)
Solution
The p subshell can hold a maximum of 6 electrons.
Correct Answer: B — 6
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Q. What is the principal quantum number of the outermost electron in a chlorine atom? (2022)
Solution
Chlorine has an atomic number of 17, and its outermost electrons are in the 3rd shell, so n=3.
Correct Answer: C — 3
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Q. What is the principal quantum number of the outermost electron in an atom of potassium? (2022)
Solution
Potassium has an atomic number of 19, and its outermost electron is in the n=4 shell.
Correct Answer: C — 3
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Q. What is the principal quantum number of the outermost electrons in an atom of chlorine? (2022)
Solution
Chlorine has an atomic number of 17, and its outermost electrons are in the n=3 shell.
Correct Answer: C — 3
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Q. Which of the following elements has the electron configuration [Ne]3s²3p⁵? (2023)
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A.
Fluorine
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B.
Chlorine
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C.
Bromine
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D.
Iodine
Solution
The electron configuration [Ne]3s²3p⁵ corresponds to Chlorine, which has 17 electrons.
Correct Answer: B — Chlorine
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Q. Which quantum number is not required to describe the electron in an atom? (2019)
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A.
Principal quantum number
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B.
Azimuthal quantum number
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C.
Magnetic quantum number
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D.
Color quantum number
Solution
Color quantum number is not a valid quantum number for describing electrons in an atom.
Correct Answer: D — Color quantum number
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