натрий (natrium)
(1779-1848)
(1778-1829)
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2,6%.
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t = 98°C; t = 883°C
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https://xn----8sbiecm6bhdx8i.xn--p1ai/%D0%BD%D
0%B0%D1%82%D1%80%D0%B8%D0%B9.html
.
https://ru.wikipedia.org/wiki/%D0%9D%D0%B0%D1
%82%D1%80%D0%B8%D0%B9
!