Organic ChemistryDiagram

Alkane Structures — First Four Members

Part of Alkanes · GCSE GCSE Chemistry revision

This diagram covers Alkane Structures — First Four Members within Alkanes for GCSE Chemistry. Topic 38: Alkanes It is section 2 of 12 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Topic position

Section 2 of 12

Practice

20 questions

Recall

15 flashcards

📐 Alkane Structures — First Four Members

3D ball-and-stick models of methane (CH₄), ethane (C₂H₆) and propane (C₃H₈) showing grey carbon spheres and white hydrogen spheres with single bonds.

Figure 1: The first four alkanes. Each carbon forms 4 bonds (single bonds only) — either to other carbons or to hydrogens. This "saturated" structure makes alkanes relatively unreactive.

Keep building this topic

Read this section alongside the surrounding pages in Alkanes. That gives you the full topic sequence instead of a single isolated revision point.

Practice Questions for Alkanes

What is the general formula for the alkane homologous series?

  • A. CₙH₂ₙ
  • B. CₙH₂ₙ₋₂
  • C. CₙHₙ
  • D. CₙH₂ₙ₊₂
1 markfoundation

Explain why the boiling point of alkanes increases as the chain length increases.

3 marksstandard

Quick Recall Flashcards

Formula for butane?
C₄H₁₀
Formula for ethane?
C₂H₆

20 questions on Alkanes — practise free

Instant marking, adaptive difficulty, and 15 spaced repetition flashcards. Free until your GCSEs.

Try PrepWise Free