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Mendeleev invented the periodic table.
Fluorine is in the halogen family and in the second period of the periodic table.
Be is the second metal. It is in the second group.
periodic table
Look for predictable changes and patters.
Argon
one should look for predictable changes and patterns
alot of changes
He is the founder of the periodic table. He arranged the elements according to the atomic masses. Few changes are made in his periodic table to make the modern periodic table.
The second element on the periodic table is helium with atomic number 2. Pi is a mathematical constant used in geometry to represent the ratio of a circle's circumference to its diameter. It is not associated with elements on the periodic table.
one should look for predictable changes and patterns