Across
- 7. most abundant element in the universe
- 8. noble gases are the least _____________.
- 11. two or more neutral atoms held by covalent bond
- 13. ease and speed with which an element reacts to another
- 14. which table puts the elements in order
- 18. rows of the periodic table
- 19. predicted by an element's place on the periodic table
- 20. characteristics that determine how the element will react
Down
- 1. atoms of two or more elements bonded together
- 2. opposites do this
- 3. characteristics observed without changing identity of substance
- 4. columns of the periodic table
- 5. the outer shell of an atom
- 6. neutral part of an atom
- 9. chemical bond where atoms transfer electrons
- 10. chemical bond where atoms share electrons
- 12. negative part of an atom
- 15. atom that has a positive or negative charge
- 16. positive part of an atom
- 17. inventor of the periodic table