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In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs.
The periodic table of the elements is the ...
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 ...
In the periodic table of the elements, each row of the table is called the period. The number of levels an atom has determines the period to which it belongs.
The periodic table of the elements is the ...
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 ...
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 ...
Display the list and select the discovery of these chemical elements that correspond.Enlarge or reduce the image with the zoom and adjust its size to the screen of your device. You can also act on the ...
Click on the discovery of these chemical elements and drag them to the right places.Enlarge or reduce the image with the zoom and adjust its size to the screen of your device. You can also act on the ...
Place the discovery of these chemical elements in chronological order.Enlarge or reduce the image with the zoom and adjust its size to the screen of your device. You can also act on the image and drag ...
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 ...
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