logo

Cambridge IGCSE Combined Science practice

Paper 4 structured question: Formulas

Try the question first, then check the answer and practise the same topic again.

Attempt questionFormulas revisionRevise the key idea

At a glance

4

Paper

2

Marks

Topic

Formulas

Exam-style question

Try this first

Paper 4Theory (Extended)2 marks

Analyzing the charges of ions to find the formula.

Description

Ionic Compound Formula Determination

Given the ions: Aluminum (Al^3+) and Oxide (O^2-), determine the formula for the ionic compound they form.

  1. a

    Analyse the charges of aluminum and oxide ions to find the formula of the compound.

    Aim for approximately 2 distinct marking points.

    [2]

0 of 1 part answered

Answer every part before opening the mark scheme.

Common mistake

No common mistake is linked to this question yet.

Related flashcards

Flashcard 1 of 6

Press Space to flip, arrows to move

Related practice questions

Question 1 of 5

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

0 of 4 attempted

Paper 4 structured question: Formulas

Paper 4Theory (Extended)1 marks

Description

Ionic Compound Analysis

You are given the following ions: Calcium (Ca^2+) and Chloride (Cl^-). Determine the formula for the ionic compound formed from these ions.

  1. a

    Determine the formula of the ionic compound formed from calcium and chloride ions.

    Aim for approximately 1 distinct marking point.

    [1]