Structure of Atom MCQ Questions and Answers for Practice

Dive into the captivating world of atomic structure with our comprehensive collection of multiple-choice questions and answers! Explore the fundamental principles of atomic theory, electron configuration, and the behavior of subatomic particles. Whether you're a chemistry student, a physics enthusiast, or simply curious about the building blocks of matter, our Structure of Atom MCQs page offers an engaging and educational experience. Test your knowledge, deepen your understanding, and unravel the mysteries of the atom through our carefully crafted quizzes. Visit ObjectiveQuiz.com now to embark on a journey through the intriguing realm of atomic science!

Structure of Atom MCQ Questions for Practice

1. For which of the following set of quantum numbers, an electron will have the highest energy?

3, 2, +1, +1/2
4, 1, 0, -1/2
4, 2, -1, +1/2
5, 0, 0, +1/2

2. Which of the following atoms or ion/atom have identical ground state configuration?

Li⁺ and He⁺
Na and K
Cl^- and Ar
F⁺ and Ne

3. A g-sub shell is characterized by

n=5
m=3
l= 4
l= 5

4. Which expression represents de-Broglie relationship?

h/mv = ρ
λ= h/mρ
h/mv = λ
mλ = v/ρ

5. The number of spherical nodes for 4d orbital is

Zero
Two
One
Three

6. The configuration 1s², 2s², 2p⁵, 3s¹ shows

Ground state of fluorine
Excited state of neon
Excited state of fluorine
Excited state of O₂^- ion

7. The electronic configuration of Cu⁺² ion is;

[Ar} 4s¹ 3d⁸
[Ar] 4s¹ 3d¹⁰
[Ar] 4s² 3d¹⁰ 4p¹
[Ar] 3d⁹

8. Which of the following orbitals has dumb-bell shape

9. The total number of orbitals in a shell having principle quantum number n is;

2n
n²
2n²
(n+l)

10. Bohrs radius for H-atom(n=1) is approximately0.53A^o. The radius of the first excited (n=2) is;

0.13 A^o
1.06A^o,
4.77A^o
2.12A^o

11. The species which is not paramagnetic among the following is;

Cl^-
Be^-
Ne⁺²
As⁺

12. What is the wavelength of light. Given energy =3.03 x 10^-19 j, h=6.62 x 10^-34 js and c=3.0 x 10 ⁸ m/s?

6.54nm
654nm
0.654nm
65.4 nm

13. The following quantum numbers are possible for how many electrons? n=3, l=2, m=+2

14. Azimuthal quantum number defines

e/m ratio of electron
Angular momentum of electron
Spin of electron
Magnetic momentum of an electron

15. The correct order of increasing energy of atomic orbitals is

5p<4f<6s<5d
4f<5p<5d<6s
5p<6s<4f<5d
5p<5d<4f<6s