Learning objective

Explain the molecular formula of a compound as representing the quantity and types of atoms in a single molecule.

Read the explanation, check the common trap, then practise with flashcards and questions.

Practise this topic Read the exam answer Topic hub

Exam focus

Read the explanation.
Check key terms.
Practise with linked questions.

Cambridge IGCSE Combined ScienceStoichiometryCore content

Study support

Understand this objective

Quick explanation

Explain the molecular formula of a compound as representing the quantity and types of atoms in a single molecule

This point belongs to Formulas, especially Formulas outcomes.
You need to be able to explain the molecular formula of a compound as representing the quantity and types of atoms in a single molecule.
The key ideas to know are Define.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Define

Why it matters

This objective helps connect Formulas outcomes to exam-style questions, flashcards, and revision notes for Formulas.

Revision tools

Choose how to practise

Back to topic hub

Flashcards10 linked cards

Flashcard 1 of 10

Press Space to flip, arrows to move

Practice Questions7 linked questions

Question 1 of 7

Choose an answer, get feedback, then move sideways through the set.

0 of 5 attempted

Paper 3 structured question: Formulas

Paper 3Theory (Core)2 marks

Description

Molecular Formula Analysis

The molecular formula of a compound provides information about the types and numbers of atoms in a molecule. For example, the molecular formula C2H5OH represents ethanol, which contains two carbon atoms, six hydrogen atoms, and one oxygen atom.

a
Explain the significance of the molecular formula in understanding chemical compounds.
Your answer
Aim for approximately 2 distinct marking points.
[2]

Revision notestopic notes

Open the full topic revision notes when you are ready to review this objective in context.

Open revision notes

Related learning objectives

Identify the chemical formulas for the elements and compounds listed in the subject material.
Formulas outcomes
Determine the formula of a simple molecular compound based on the number of atoms shown in a model or diagram.
Formulas outcomes
Create word equations that illustrate how reactants transform into products.
Formulas outcomes
Balance and analyze simple symbol equations, including those with state symbols.
Formulas outcomes
Determine the formula of an ionic compound based on the relative quantities of ions depicted in a model or diagram, or from the charges of the ions.
Formulas outcomes

Revision hubs

Move back to a broader study route

Cambridge IGCSE Combined Science resources