4.4.1.1 The Structure

Spec reference: 4.4.1 (subtopic).

What you need to know

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Self-assessment (checklist)

• I can state the radius of an atom.
• I can describe how the radius of a nucleus compares to
• I can describe the basic structure of an atom.
• I can state the charge of the nucleus of an atom.
• I can state the charge of an electron.
• I can describe how electrons are arranged in atoms.
• I can describe how electron arrangements may change
• I can describe how electron arrangements may change

Key steps (method)

• Identify what the question is testing and use the correct equation/definition.
• Show substitutions and units clearly.

Common mistakes

• Unit conversions, rearranging errors, or quoting a law without applying it.