The first twenty elements on the table
Chemistry · Grade 10 · about 40 minutes
Place H to Ca by atomic number, write each arrangement, and read group and period from it.
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- 8 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- Position and electron arrangement
- Ions, formulae and equations
- How the periodic table was invented
- Mendeleev's gaps and predictions
- Moseley and atomic number order
- Layout of the modern table
- Groups as chemical families
- Periods and electron shells
- The first twenty elements on the table
- Hydrogen's special position
- Metals, non-metals and metalloids
- What makes a metal
- What makes a non-metal
- The metalloid staircase
- The alkali metals
- The alkaline earth metals
- The halogens
- The noble gases
- The transition metals
- Trends in atomic radius
- Trends in ionisation energy
- Trends in melting point
- Trends in reactivity
- Soda ash and salt from Kenya
- Limestone and fluorspar
- Kenyan metal ores
- Predicting properties from position
- The table as a working tool