Identify the correct statements from the following :
A. Heisenberg uncertainty principle is applicable to electrons.
B. The size of $2 p_x$ orbital is less than the size of $3 p_x$ orbital.
C. The energy of 2 s orbital of H atom is equal to the energy of 2 s orbital of Li .
D. The electronic configuration of Cr is $[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1$
Choose the correct answer from the options given below:
Select the correct option:
A
A, B and C Only
B
A, B and D Only
C
B, C and D Only
D
A, C and D Only
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
(A) Heisenberg uncertainty principle is applicable to all the moving microscopic particles.
(B) $2 p_x$ has less value of $n$ thus has lesser size than $3 \mathrm{p}_{\mathrm{x}}$.
(C) $\mathrm{E}_{2 \mathrm{~s}}(\mathrm{H}) \neq \mathrm{E}_{2 \mathrm{~s}}(\mathrm{Li})$
(D) $\mathrm{Cr}:-[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1$
Correct statement are A, B and D.
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