CAIE IGCSE Chemistry Predicting Alkali Metal Properties
Practise extrapolating Group I trends to identify an unknown element and predict melting point, density or reaction vigour from neighbouring data.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- place an unknown Group I element from its outer electron and relative-reactivity evidence
- extrapolate melting point or density from neighbouring values without reversing the trend
- predict a more vigorous reaction with water or oxygen for an element lower in the group
8.2.2—Predict the properties of other question 1
Iron is a transition element. Potassium is a Group I element.
Chemical properties of some Group I elements are shown in the table.
Add to the table:
- the flame test colours for sodium and potassium
- the predicted reactions of rubidium with water and with oxygen.
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