Curriculum
Science — First Preparatory
Unit 1: Matter
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Unit 2: Forces
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Unit 3: Life
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Unit 4: Earth and Space
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Text lesson
The Periodic Table
The Periodic Table
Lesson summary
Lesson summary
- In the modern periodic table, elements are arranged in increasing order of atomic number.
- The table has 7 periods and 18 groups.
- Period number = number of occupied energy levels. Group number is found from the number of outer-level electrons.
- Metals are on the left, non-metals on the right, and noble gases are in group 18 and are unreactive.
The Periodic Table · 6 / 6
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