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Which of the first 20 elements in the periodic table are metal and which are non-metals? | Socratic
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What Are the First 20 Elements - Names and Symbols
A simple way to memorise first 20 elements of the Periodic Table - YouTube
First 20 Elements of the Periodic Table
Identifying the First 20 Elements Periodic Table Activity
Identifying the First 20 Elements Periodic Table Activity
What are the uses of the first 20 elements of the periodic table? - Quora
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First 20 Elements with Symbols and Atomic Number (Table)
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Atomic Numbers of the First 20 Elements in the Periodic Table Quiz - Trivia & Questions
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