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Learning objective

Identify the electronic configuration for elements with atomic numbers ranging from 1 to 20, such as 2,8,3.

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

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  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE Combined ScienceAtoms, elements and compoundsCore content

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Quick explanation

Identify the electronic configuration for elements with atomic numbers ranging from 1 to 20, such as 2,8,3

  • This point belongs to Atomic structure and the Periodic Table, especially Atomic structure and the Periodic Table outcomes.
  • You need to be able to identify the electronic configuration for elements with atomic numbers ranging from 1 to 20, such as 2,8,3.
  • The key ideas to know are Determine.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Determine

Why it matters

This objective helps connect Atomic structure and the Periodic Table outcomes to exam-style questions, flashcards, and revision notes for Atomic structure and the Periodic Table.

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Paper 3 structured question: Atomic structure and the Periodic Table

Paper 3Theory (Core)1 marks

Description

Electronic Configuration of Elements

The electronic configurations of the first 20 elements are crucial for predicting their chemical behavior. For example, Sodium (Na) has an atomic number of 11 and an electronic configuration of 1s² 2s² 2p⁶ 3s¹.

  1. a

    Identify the electronic configuration of Chlorine (Cl).

    Aim for approximately 1 distinct marking point.

    [1]
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