Q1 / 160 · AP EAMCET 2013 · Chemistry

The number of radial nodes of $3 \mathrm{~s}$ and $2 p$ orbitals respectively are

  • A
    0,2
  • Correct answer
    B
    2,0
  • C
    1,2
  • D
    2,1

Solution

Number of spherical/radial nodes in any orbital $$ =n-I-1 $$ For $s=$ orbitals, $I=0$. $\therefore$ Number of radial nodes in 3s-orbital $$ =3-0-1=2 $$ For $p$ - orbitals, $I=1$ $\therefore \quad$ Number of radial nodes in $2 p$-orbitals $$ =2-1-1=0 $$

Hence, the correct answer is option: 'B'.

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