Atomic Theory

MCQ Questions Answers on Atomic Theory

Atomic theory questions answer (MCQ) set of contains 9 question answers related to Bohr’s model of the hydrogen atom structure, electromagnetic spectrum series, and quantum numbers of orbitals in atoms for chemistry online courses for college and school students. After complete this quiz questions set, students can see the answer and score of this online test series of atomic theory or structure. Below the picture, we can discuss the different quantum numbers of atoms that help to solve this question set of atomic theory.

According to Rutherford, the entire mass of an atom was concentrated in a tiny positively charged nucleus and around which the extranuclear electron particles moving in constant motion. But a moving charged particle emits radiation with the loss of kinetic energy and eventually hits the nucleus of an atom. Therefore, to resolve the anomalous position Bohr model of hydrogen was proposed, which is based on several novel postulates. But modern structure and properties of the atoms or molecules based on the electronic configuration which suggested the chemical bonding and position of the chemical element on the modern periodic table.

MCQ-Questions Answers Set

12

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1 / 9

What is the radius of the second orbit hydrogen atom (r₁ of Hydrogen 0.529 Å)

2.15 Å

2.12 Å

2.18 Å

2.20 Å

2 / 9

The lowest wavelength of the Lyman series of the hydrogen spectrum = x, then the highest wavelength of the Paschen series of helium ion?

42x/7

48x/7

30x/7

36x/7

3 / 9

The wavelength of the Hɑ line of the Balmer electromagnetic spectrum of the hydrogen atom

666.5 nm

656.5 nm

676.5 nm

646.5 nm

The energy of an electron (E_n) = (E₁/n²) × Z²
where E₁ = energy of an electron in hydrogen.

4 / 9

Energy of an electron in the first energy level of the hydrogen atom = -13.6 eV. Calculate the energy of an electron in the excited level of helium ion

-30.6 eV

-32.6 eV

-31.6 eV

-33.6 eV

5 / 9

The number of unpaired electrons of an ion M^+x(Z of M = 25) with the magnetic moment √15 B

6

2

3

4

6 / 9

Possible orbitals where principal quantum number = 4

16

14

20

12

7 / 9

Quantum numbers set of the 19th electron of chromium

4, 1, 0, +½

3, 0, 0, +½

4, 0, 0, +½

4, 0, 1, +½

8 / 9

The number of electrons can have principal quantum number four and azimuthal quantum number one

6

8

4

3

9 / 9

The four quantum numbers for the valence shell electron of rubidium atom

5, 1, 0, +½

4, 0, 0, +½

5, 1, 1, +½

5, 0, 0, +½

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