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2023-11-09 21:20:41
NH4NO3
2023-11-09 21:15:24
a) SO3
b) CH4
c) FeSO4
2023-11-09 21:11:16
(1): nguyên tử
(2): nguyên tố
(3): 1:2
(4): gấp khúc
(5): đường thẳng
2023-11-09 21:08:57
Số hiệu nguyên tử Z | Tên nguyên tố hóa học | Kí hiệu hóa học |
1 | hydrogen | H |
6 | carbon | C |
11 | sodium | Na |
17 | chlorine | Cl |
18 | argon | Ar |
20 | calcium | Ca |