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1. | Noble or inert gas used in glowing signs |
3. | The central part of an atom containing neutrons and protons |
5. | __________ table of elements |
6. | This element has 5 electrons |
7. | The symbol of this element is S |
8. | This element has an atomic number of 7 |
11. | The element we need to breathe |
14. | This element has the chemical symbol Be |
15. | This element has an atomic mass of 31 |
20. | The current model for an atom known as an electron ___________ |
21. | JJ Thompsom proposed the plum __________ model of the Atom |
22. | An element becomes ______________ when it has more neutrons than protons and becomes unstable |
23. | Pure substance containing one type of atom |
24. | Neutral sub atomic particle |
25. | We get this element that makes our bones strong from milk |
27. | This element has an atomic number of 12 |
28. | This element has 17 protons |
30. | This element has the chemical symbol Na |
34. | This is made up of protons, neutrons and electrons |