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Câu 28:

Hạt nhân $_{Z}^{A}X$

Câu 28: Hạt nhân ZAX_{Z}^{A}XZA​X có số prôtôn là

Thông tin câu hỏi

Câu 28:

Hạt nhân $_{Z}^{A}X$ có số prôtôn là