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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Rank the following orbitals in the H atom in order of increasing energy: 3s, 2s, 2p, 4s, 3p, 1s, and 3d.

Interpretation Introduction

Interpretation: The increasing energy order of given orbitals in hydrogen atom is to be determined.

Concept introduction:

Electron configuration is the distribution of electrons in the atomic orbitals. It gives an idea about the shape and energy of electrons in an atom.

There are 3 rules to decide the electronic configuration of an atom. They are,

  • Pauli Exclusion Principle: No two electrons should not have same four quantum numbers in an atoms that is, it no two electrons should have same principal quantum number (n), same orbital angular momentum quantum number (l), the same magnetic quantum number (ml) or same spin magnetic quantum numbers (ms)
  • Aufbau Principle: In an atom, electrons fill according to the increasing energy of the orbital.
  • Hund's Rule: The orbital having maximum number of electrons with same spin in separate orbitals is the most stable arrangement in an orbital.
Explanation

The orbitals are filled according to Pauli Exclusion Principle, Aufbau Principle and Hund's Rule. In an atom, electrons fill according to the increasing energy of the orbital.

Increasing energy order of orbitals is

  1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<

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