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atomic structure review answers

1. 2

2. 3

3. 3

4. 1

5. 2

6. 1

7. 1

8. 1

9. 1

10. 1

11. 1

12. 1

13. 4

14. 4

15. 3

16. 3

17. 3

18. 1

19. 2

20. 4

21. 2

22. Y

23. gold foil experiment, alpha particles were "shot" at gold foil, the nucleus is small dense and positive & volume is mostly empty space

24. H and He

25. electrons move from an excited state to a ground state releasing energy

26. [(19.91 x 10.01) + (80.09 x 11.01)] / 100

27. 18 electrons, potassium ion has one less shell than a potassium atom, positive charge

28. the three isotopes of Ne have the same number of protons and different number of neutrons

29. [(19.99 x 90.9) + (20.99 x 0.3) + (21.99 x 8.8)] / 100

30. 20

31. volume is empty space

32. the nucleus is small dense and positive

33. volume is mostly empty space the nucleus is small and positive

 

 

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