Zheleznyi pik
Elementy gruppy zheleza ot skandiya Sc do nikelya Ni, do kotoryh sovershayutsya yadernye prevrasheniya v yadrah massivnyh zvezd. V yadrah zvezd eti reakcii idut s vydeleniem energii. Dlya sinteza bolee tyazhelyh elementov v zvezde neobhodima zatrata energii i pri obychnyh usloviyah v yadrah zvezd takoi sintez ne proishodit.
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