Youtor
Tabla Periódica 3 Grupo 2 Metales Alcalinotérreos
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=1SAg4Mx87CM
Third episode of a series in which we study the periodic table of the elements without using mnmonics. • The group 2 is characterized because is elements have two valence eletrons, this is two electrons in its outer shell. They are known as alkaline earth metals, They are bright metals, quite soft and with quite low density, but highier than that of water. The y are quite reactive, forming hydroxides in contact with water, but the reaction speed is lower than in the case of alkaline metals. • As we go down in this group 2, they are more reactive, because its valence electron is at a higher level. (Each period in the table correspond to a level o layer at the electronic shell of the atom). • https://en.wikipedia.org/wiki/Alkalin... • https://en.wikipedia.org/wiki/Periodi... • https://en.wikipedia.org/wiki/Beryllium • https://en.wikipedia.org/wiki/Magnesium • https://en.wikipedia.org/wiki/Calcium • https://en.wikipedia.org/wiki/Strontium • https://en.wikipedia.org/wiki/Barium • https://en.wikipedia.org/wiki/Radium • Patreon ► / cienciabit • Susbcribe ► https://www.youtube.com/subscription_... • Do you want to contribute subtitles? ► http://www.youtube.com/timedtext_cs_p... • Cienciabit ► http://www.cienciabit.com
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