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Periodic table, lanthanide group without symbols (difficult)

Lanthanides are a group of elements also called "rare earths" because they are in the form of oxides. They form the "internal transition elements" next to the actinides, with which ...

Periodic table by groups without symbols (difficult)

Following a classification according to the bonding and ionization properties of the elements, the elements of the periodic table can be classified as:

Metals

Semimetals

No metals

Noble gases

Th ...

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