2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20ĐA(CHO NA = 23,...

Câu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20ĐA(Cho Na = 23, Cu = 64, Al = 27, Fe = 56, Zn = 65, O = 16, H = 1, P = 31, N = 14)