Across
- 4. describes the recurring pattern of properties
- 5. discovered by JJ Thomson
- 13. what noble gas has two protons
- 15. follows specific guidelines of IUPAC
- 16. properties of both metals and non-metals opposite of metals
- 17. The charge of protons
- 18. vertical columns
- 23. does not allow heat and electricity to pass through
- 24. unique magnetic and radioactive properties
- 25. his atomic model was at 1913
- 27. discovered the nuclear models
- 28. allows heat and electricity to pass through
- 29. his atomic model was at 1927
- 30. reactive metals
- 31. central part of an atom
- 32. region of space where an electron can be found
- 35. number of protons in the nucleus
- 36. contains metals, metalloids, non-metals
Down
- 1. most electronegative element
- 2. first element of the periodic table
- 3. revealed atoms have a smell, dense, positively charged nucleus
- 6. easily broken
- 7. characteristic you can observe
- 8. widely used in formulas and equations
- 9. ability to be stretched into wire
- 10. The charge of electrons
- 11. discovered plum-pudding model
- 12. good conductor of heat and electricity
- 14. can be pounded or rolled into thin sheets
- 19. negatively charged
- 20. his atomic model was at 1800s
- 21. neutral particles
- 22. third element of the periodic table
- 26. positively charged
- 33. matter reflects light from its surface
- 34. ability to form colorful compounds