Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
KCET2014Chemistryp Block Elements (Group 15, 16, 17 & 18)

The statement that is NOT correct is

Options

  1. AEnergies of stationary states in hydrogen like atoms is inversely proportional to the square of the principal
  2. BThe radius of the first orbit of ( He ⁺ )is half that of the first orbit of hydrogen atom.
  3. CAngular quantum number signifies the shape of the orbital.
  4. DTotal number of nodes for ( 3 ~s ) orbital is three

Correct answer

D. Total number of nodes for ( 3 ~s ) orbital is three

Step-by-step solution

The total number of nodes of an orbital is the sum of angular and radial nodes and is given in terms of the n and I quantum number by the following equation. Number of nodes =n-l-1 for 3 s-orbital, n =3 I =0 Nodes =3-0-1=2 Because for s-orbitals, l =0 , therefore, there is no angular nodes only radial nodes are present, that is, 2 radial nodes.

Practice p Block Elements (Group 15, 16, 17 & 18) on Quantrex Academy →

More from p Block Elements (Group 15, 16, 17 & 18)

Which among the following is NOT in accordance with the property stated against it? 2026Complete hydrolysis of Xenon hexafluoride gives HF along with compound X. The hybridisation in X is 2025Orthophosphorus acid on disproportionation gives PH ₃ and another oxoacid of phosphorus ' X '. The basicity of X is 2025Observe the following P ₄+ SOCl ₂ Products P ₄+ SO ₂ Cl ₂ Products In both the reactions, a common product ' x ' is obtained. The number of lone pair of elecrons on the central ato 2025The number of P = O , P - P bonds present in oxoacid of phosphorus, prepared by treating red P ₄ with alkali are respectively 2025Which of the following is not correct? 2025Nature of two oxides of nitrogen X and Y formed in the reaction of sodium nitrite with hydrochloric acid is 2025Which of the following is not correct ? 2025 Full p Block Elements (Group 15, 16, 17 & 18) list All KCET PYQs