1. • Describe early attempts to order the elements.
Week 10
• Describe early attempts to order the elements.
• Appreciate that scientific knowledge is not absolute.
• Understand how advances in scientific knowledge are accepted.
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2. Week 10
• Understand the work of Mendeleev and others in developing the modern Periodic Table.
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3. Week 10
• Describe the Periodic Table in terms of the arrangement of elements by increasing atomic number, in periods and in groups.
• Explain how periodicity is a repeating pattern across different periods.
• Explain how atoms of elements in a group have similar outer-shell electron structures, resulting in similar properties.
• Describe the variation in electron structures across Periods 2 and 3.
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4. Week 10 The Periodic Table © Pearson Education Ltd 2008
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5. Group 4: Non-metal to metal
Week 10
Group 4: Non-metal to metal
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6. Week 10
• Explain that ionisation energy depends upon: atomic radius; electron shielding; and nuclear charge.
• Describe the variation of the first ionisation energies and atomic radii of elements across a period and down a group.
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7. First ionisation energies of the first 20 elements
Week 10
First ionisation energies of the first 20 elements
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8. Trend in first ionisation energy and atomic radius across a period
Week 10
Trend in first ionisation energy and atomic radius across a period
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9. Trend in first ionisation energy and atomic radius down a group
Week 10
Trend in first ionisation energy and atomic radius down a group
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10. Week 10
• Describe the variation in both melting and boiling points for the elements of Periods 2 and 3.
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11. Boiling points of Period 2 and Period 3 elements
Week 10
Boiling points of Period 2 and Period 3 elements
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12. Increase in boiling point from Na to Al
Week 10
Increase in boiling point from Na to Al
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