Color Coding the Periodic Table

The elements at the bottom of the table were pulled out to keep the table from becoming too long. The first period at the bottom is called the _____. The second period at the bottom of the table is called the _____. PERIODIC TABLE OF THE ELEMENTS. 1 1A 18. 8A 1 H 2. 2A 13. 3A 14. 4A 15. 5A 16. 6A 17 ................
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