... **#'A3!?F( B C'-39 B →.t B :* B :#*→ B B :C→ B :C:#* B :C→ B :C:#*# B C(9?2* ... nguyên tố như sau:H = 1,< /b> C = 12< /b> , N = 14< /b> , O = 16< /b> , Na = 23, Mg = 24, Al = 27, S = 32, Cl = 35,5K = 39, Ca = 40, Cr = 52, Fe = 56, Cu = 64, Zn = 65, Br = 80, Ag = 10< /b> 8, Ba = 13< /b> 7.?''&';@ ... $'A3@)?F',7T%- B : ?B ,C:?CK"((3' 1< /b> ? B ::C→C:: B C? B ::C→ B :C:'? B :C:→ B ::C...