parts of an atom

2:24

7:44

30:31

1:44

4:14

11:45

2:02

4:00

12:15

4:42

7:37

4:26

6:21

4:38

3:07

10:59

14:10:58

19:33

4:38

6:24

6:45

2:06

4:23

4:52

40:52

2:13:01

31:56

1:57:06

9:39

14:14

52:09

8:28

10:52

6:21

1:24:41

1:59

10:24

3:27

4:59

52:05

13:10

2:57

5:12

1:16

1:16:37

2:18

7:26

10:19

20:21

56:27

4:14

00:52

6:13

1:13:57

52:36

13:52

49:52

10:12

1:57

21:44