Periodic table - Simple English Wikipedia, the free encyclopedia
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:max_bytes(150000):strip_icc()/periodic-table-of-the-elements-2017--illustration-769723031-5aa02f9b04d1cf00386ccf7c.jpg "Definition of a Chemical Period - Chemistry Glossary")
Definition of a Chemical Period - Chemistry Glossary
Periodic Table Groups vs. Periods | Properties & History - Lesson | Study.com
groups & periods- A group is a column on the periodic table. Elements in the same group have similar chemical pro… | Periodic table, Noble gas, Group periodic table
