Introduction to the Periodic Table
How chemists organised the elements, and why the arrangement is so useful.
What this lesson covers
Introduction to the Periodic Table is a 10-part Class 7 Science lesson. Each part makes one point and then hands over to the next, so it can be read in a sitting or picked up again at the part you stopped on. It defines the idea in plain words before using it, works through an example step by step, breaks the topic into its parts and compares them, shows where it is used outside the textbook, names the mistakes that cost marks in an exam, ends with a recap of what to remember.
How it begins
The Periodic Table lists all the known elements, arranged in order of atomic number. Each element has a symbol of one or two letters: the first always a capital: H, He, Na, Fe.
The 10 parts
- A table of all the elements
- Groups and periods
- Metals and non-metals
- Group 1: the alkali metals
- Group 7 and Group 0
- Why Mendeleev's table was brilliant
- Reading the table
- Where marks go
- What to remember
- Watch one worked through
Practise Introduction to the Periodic Table
Everything on QuizByt for Class 7 Science that goes with this lesson: read it first, then test yourself while it is fresh.
🧠 5 quizzes on Introduction to the Periodic Table (2 easy, 2 medium, 1 hard)
Work up from easy to hard: the hard quiz asks the Class 7 exam-style questions on Introduction to the Periodic Table.
🖨️ Printable worksheet
Introduction to the Periodic Table on paper for Class 7, with room to write the working out. Preview the first page free.
🎮 Games for Class 7 Science
Memory and reasoning games at the right level for Class 7. Passing a quiz on Introduction to the Periodic Table earns the credits that open them.
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