Question

Which of the following statements in relation to the hydrogen atom is correct?

• A. $3\text{s}$ , $3\text{p}$ and $3\text{d}$ -orbitals all have the same energy.
• B. $3\text{s}$ and $3\text{p}$ -orbitals has lower energy than $3\text{d}$ -orbital.
• C. $3\text{p}$ -orbital has lower energy than $3\text{d}$ -orbital
• D. $3\text{s}$ -orbital has lower energy than $3\text{p}$ -orbital

Answer 1

Answer: (A)

Hydrogen atom is in $1{\text{s}}^1$ and these 3 $\text{s}$ , 3 $\text{p}$ and 3 $\text{d}$ -orbitals will have same energy with respect to 1 $\text{s}$ -orbital because Hydrogen atom is a single electron system and its energy depends on only one the value of principal quantum number(n).