Secondary IV • 3yr.
Does the way the periods are arranged in the periodic table mean anything? thank you
Does the way the periods are arranged in the periodic table mean anything? thank you
Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
Hello!
The periods of the periodic table indicate the number of electron shells of the elements that are there.
The elements of the first period, hydrogen (H) and helium (He), have a single electron shell, while the elements of the third period, for example calcium (Ca) and arsenic (As) , have three electron shells.
The periods are therefore established to classify this number of layers.
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