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Structure of Atoms NDA Questions
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Materials Used in the Preparation of Substances like Soap, Glass, Ink, Paper, Cement, Paints, Safety Matches and Gun-Powder
Elementary Ideas About The Structure of Atom, Atomic Equivalent and Molecular Weights, Valency
Structure of Atoms
Classification of Elements and Periodicity in Properties
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The S-Block Elements
The P-Block Elements
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Structure of Atoms MCQ Questions
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7.
Which of the following elements has an atomic number of 11?
A.
Sodium (Na)
B.
Potassium (K)
C.
Magnesium (Mg)
D.
Calcium (Ca)
π
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Rough Work
Error
ANSWER
:
A. Sodium (Na)
8.
The dual nature of matter is expressed by which principle?
A.
de Broglie hypothesis
B.
Heisenberg's uncertainty principle
C.
Planck's theory
D.
Einstein's theory
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ANSWER
:
A. de Broglie hypothesis
9.
The shape of the p-orbital is__________
A.
Dumbbell-shaped
B.
Spherical-shaped
C.
Planar
D.
Circular-shaped
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Error
ANSWER
:
A. Dumbbell-shaped
10.
The energy of an electron in a hydrogen atom increases when it moves__________
A.
To a higher orbit
B.
To a lower orbit
C.
To the nucleus
D.
To the outermost shell
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Error
ANSWER
:
A. To a higher orbit
11.
Which quantum number determines the orientation of the electronβs orbital?
A.
Azimuthal quantum number
B.
Principal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
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Error
ANSWER
:
C. Magnetic quantum number
12.
The number of orbitals in the p-sublevel is__________
A.
2
B.
3
C.
5
D.
4
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Rough Work
Error
ANSWER
:
B. 3
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