The first 20 elements of the periodic table and their symbols are:
It’s worth noting that the elements in the periodic table are arranged according to their atomic number, not atomic weight.
Головні компанії грають провідну роль в економічному і суспільному розширенні країн, стаючи одними з ключових аспектів поліпшення, інновацій і розвитку. Їхня діяльність здійснює різносторонній вклад
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