Across
- 3. lightest gas of the noble gases
- 4. a gas with an AMU of 16 that is essential for life
- 9. silicon's AMU is about half of this elements AMU
- 10. metals used in our everyday lives
- 13. basic unit of all matter
- 14. an element that has 4 neutrons
- 15. horizontal rows on the periodic table
- 16. two or more chemically bonded elements
- 17. nonreactive/colorless/odorless gases
- 21. first person to organize the periodic table of elements
- 25. transition metal that liquid at room temperature
- 26. elements that are right of the stair case
- 28. vertical columns on the periodic table
- 29. a group found in period 7 that is rare and radioactive
- 30. number of periods on the periodic table
- 32. pure as they contain only one type of atom
- 34. the mass or weight of an element
- 36. this element is the second most reactive halogen
- 37. AMU minus the atomic number
Down
- 1. second most reactive metal group
- 2. organization of elements by group and period
- 5. these elements are found on the staircase
- 6. this element is a liquid and found in the halogen group
- 7. total the number of groups on the periodic table
- 8. most reactive nonmetal group
- 11. the number of A groups on the periodic table
- 12. this element is found in group 6A/period 3
- 18. elements with metal and nonmetal characteristics
- 19. most reactive nonmetal element
- 20. most reactive metal on the periodic table
- 22. this element has an AMU of 238
- 23. Group 1A/lightest gas in the universe
- 24. elements that are left of the stair case
- 27. number of gases on the periodic table other than the 8A group
- 30. orbital paths found around the nucleus of an atom
- 31. this element is found on the stair case but isn't a metalloid
- 33. a group found in period 6 that is rare and radioactive
- 35. most reactive metal group on the table