IB Chemistry HL 3.1.1 Organization Questions
Use real exam questions to infer periodic position, classify elements and compare properties from group and block evidence.
- Syllabus
- First assessment 2025
- Course
- Chemistry HL
- Level
- HL
Exam points
- Infer an element’s s-, p-, d- or f-block, group and period from periodic-table position and electron-configuration evidence.
- Classify metals, non-metals and metalloids, including lanthanides and actinides, using group, period and chemical evidence.
- Use periodic organization to compare related elements and predict a stated physical or chemical property or reactivity pattern.
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IB Chemistry HL 3.1.1 Organization Questions question 1
[Maximum number: 1]
Lithium and boron are elements in period 2 of the periodic table. Lithium occurs in group 1 (the alkali metals) and boron occurs in group 3. Isotopes exist for both elements.
Distinguish between the terms group and period.
Group: (elements in vertical) columns in periodic table and Period: (elements in horizontal) rows in periodic table;
Allow elements in same group have similar chemical properties and within a period, atoms have same number of shells/energy levels (but number of electrons in valence/outer shell increases).
Marking guidance:
Allow groups distributed vertically and periods distributed horizontally / OWTTE.
Allow group number gives number of valence/outer shell electrons (for main
group elements) and period gives same number of shells/energy levels.
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