Сколько s- и d-электронов в атоме элемента с порядковым номером 44?

10; 16
9; 17
10; 18
9; 18

📝 Detailed explanation

Z = 44 — Ru: 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d⁷5s¹. s-электроны: 2+2+2+2+1 = 9; d-электроны: 10+7 = 17.

28 / 71 (39%)

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