isotopes chemistry

3:50

2:32

11:23

49:33

15:30

1:17:31

5:01

5:28

9:21

7:00

4:13

7:31

17:05

24:37

30:51

31:18

2:22

کوتاه

52:58

5:51

19:36

50:40

24:26

14:24

11:35

45:14

13:42

15:45

24:29

15:14

4:03

1:03

3:33

3:41

18:35

2:46

9:14

27:14

49:59

22:47