Skip to content

Crunch Chemistry

The ultimate A level chemistry resource

  • Fundamentals
    • Maths skills for chemists
    • Calculations for AS and A level Chemistry
    • Working with gases
    • Atoms and ions
    • Bonding and Structure
    • Environmental chemistry
  • Inorganic chemistry
    • Redox reactions
    • Explaining the chemistry of Group 2 metals
    • Explaining the chemistry of the Group 7, the halogens
    • Bonding in the nitrogen oxides and oxyanions
    • Trends in Period 3
    • Transition metal chemistry
  • Organic chemistry
    • How do organic reactions actually happen?
    • Stabilising carbocations through inductive and mesomeric effects
    • Alkanes and Crude Oil
    • Alkenes
    • Halogenoalkanes
    • Alcohols
    • Carbonyl compounds
    • Organic nitrogen compounds
    • Benzene and other aromatic molecules
  • Physical chemistry
    • Acids, bases, buffers and pH
    • Chemical equilibria
    • Electrochemistry
    • Enthalpy changes
    • Entropy
    • Reaction kinetics
    • Solubility
  • Analytical chemistry
    • How does electromagnetic radiation affect molecules?
    • Atomic absorption and emission spectroscopy
    • Mass spectrometry
    • Infrared spectroscopy
    • Nuclear magnetic resonance spectroscopy
    • Mixed spectra long answer exam question practice
    • Everything you need to know about chromatography
    • Qualitative analysis
  • Newsletters …
  • 1:1 chemistry tuition …

Tag: sp3

Cat Links Fundamentals, Organic chemistry

Using valence bond theory to explain sigma and pi bonds

Posted on June 29, 2022January 7, 2025 Sarah Parkes

Our familiar model of covalent bonding is largely based on the Lewis model, with atoms sharing pairs of bonding electrons

Continue readingUsing valence bond theory to explain sigma and pi bonds

Recent Posts

  • The chemistry of amines
  • Don’t know what your calculations mean? You’re not alone!
  • Mixed spectra long answer exam question practice
  • Understanding the structure of benzene
  • What is a homogeneous catalyst?

Recent Comments

No comments to show.
  • Contact me!
  • About me ….
Copyright © 2025 Crunch Chemistry | Signify Education by WEN Themes
Scroll Up