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Periodicity
This topic connects periodic position to electronic structure, bonding and physical properties.
7
Objectives
10
Flashcards
10
Questions
90 min
Study time
AqaA LevelChemistryInorganic chemistry
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Syllabus checklist
What you need to know
7 objective pages available
Classification3 objectives
- Classify elements as s, p, d or f block from their position in the Periodic Table.
- Explain how proton number determines periodic table position.
- Link block classification to electron configuration.
Physical properties of Period 3 elements4 objectives
- Explain the trend in atomic radius across Period 3.
- Explain the trend in first ionisation energy across Period 3.
- Explain melting point trends across Period 3 using structure and bonding.
- Use periodic data to justify explanations of trends.
Key terms
Periodic TableBlock classificationProton numberPeriodic tableElectron ConfigurationPeriodic TrendsAtomic RadiusEffective Nuclear ChargeIonisation EnergyPeriodicityMelting PointGiant Covalent Structure
Exam tips
- Use the Periodic Table effectively: Familiarize yourself with the layout of the Periodic Table to quickly identify the block and group of an element.
- Understand the periodic trends: Familiarize yourself with how proton number affects the properties of elements, including reactivity and group classification.
Common mistakes
- Misclassifying elements: Refer to the electron configuration and the position of the element in the Periodic Table to determine its block.
- Confusing atomic number with atomic mass: Remember that atomic number refers to the number of protons, while atomic mass is the weighted average mass of an element's isotopes.
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