periodic table
Across
- 3. what is the name of electrons on the outermost shell of an atom
- 7. if metal is affected by chemical action then it will start to ---
- 8. this lanthanide has the atomic number of sixty seven
- 11. what is the name of the structure used to count valence electrons
- 13. this element is the most reactive alkali metal
- 15. these are known as rare earth metals
- 17. this type of element is inert
- 21. during an ionic charge metals --- electrons
- 23. this element gets a positive three charge when affected by an ionic charge
- 27. this type of element has a gray luster when cut
- 28. this alkali metal is used in rechargable batteries
- 29. who made the modern version of the periodic table
- 30. this transition metal is used in nuclear reactors
- 31. who attempted to make the periodic table but it was ruled incomplete
Down
- 1. this type of metal are good conductors
- 2. all of these elements are radioactive
- 4. Nonmetals aren't very durable they are ---
- 5. what group of element does not change into ions
- 6. during an ionic charge nonmetals --- electrons
- 9. this type of element has silvery grey metals
- 10. fluorine is this type of element
- 12. this actinide is a naturally occurring radioactive element
- 14. who was credited as the first to invent the periodic table
- 16. this halogen produces a toxic vapor at room temperature
- 17. in a vacuum tube this noble gas glows reddish-orange
- 18. this type of element holds the most reactive non metals
- 19. This type of element are between the others in terms of properties
- 20. this alkali earth metal is used in the body for nerve reactions
- 22. this element is known to resist oxidation and does not give a lot of reaction to water
- 24. potassium is this type of element
- 25. this metaloid is used in night vision
- 26. this element gets a negative one charge when affected by an ion charge