Актиний, лат. Actinium (Ac) тайӧ 89-ӧд химия элемент. Актинид, радиоактив. Топыдлун - 10,07 г/см³. Сылан температура - 1323 K либӧ 1050 °C. Пуӧ 3471 K либӧ 3198 °C дырйи.

89
2
9
18
32
18
8
2
Ac
227,028
Актиний

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