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0
2023-11-10 20:02:27
1. nguyên tử
2. nguyên tố
3.1:2
4. gấp khúc
5.đường thẳng
2023-11-10 20:00:13
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 | Cl |
2023-03-25 08:58:49
2023-03-25 08:58:49
2022-12-04 10:37:15
số viên bi Bình còn là
45-28=17 (viên)
Đáp số : 17 viên bi
2022-12-04 10:33:37
2022-02-26 08:25:27
2022-02-19 15:19:30
2022-02-19 15:19:27
2022-01-11 06:26:29