Question

(1) The probability of finding an electron is maximum at certain places in space.
(2) Energy change takes place only during excitation or deexcitation of electrons.
(3) Electron has both particle and wave nature.
(4) Angular momentum of the electrons revolving in different elliptical orbits is quantized.

Arrange the above statements of different models or principles in chronological order, which ultimately led to the development of modern structure of the atom.

• A. $1,2,3,4$
• B. $2,4,3,1$
• C. $4,3,2,1$
• D. $2,3,1,4$

Answer 1

The correct option is B

$2,4,3,1$

The explanation for the incorrect options: (B)

1. Energy change takes place only during the excitation or deexcitation of electrons. $\left(1910\right)$
2. Angular momentum of the electrons revolving in different elliptical orbits is quantized. $\left(1913\right)$
3. The electron has both particle and wave nature. $\left(1924\right)$
4. The probability of finding an electron is maximum at certain places in space. $\left(1926\right)$

The explanation for the incorrect options:

(A) The chronological order of different models which ultimately led to the development of the modern structure of the atom is not $1,2,3,4$.

(C) It is not the given order $4,3,2,1$that represents the chronological order of different models.

(D) The chronological order of different models is not $2,3,1,4$

Hence, option (B) is correct - The chronological order of different models is $2,4,3,1$.