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Across 2. pressure goes up volume goes down or vice versa 5. these substances are made of one kind of atom 8. most elements are at this state at room teperature 9. to show you many of each molecule there is 10. proposed the modern atomic model 11. elements organized by their properties 13. forms between two nonmetals 14. tiny structures that make up all matter 16. CO 18. the model of an atom 19. elements made up in a lab 21. he drew the 1st periodic table 22. variable constant in gay= lussacs law 23. forms when electrons are lost 24. poor conductors of heat and electricity, dull and brittle

Down 1. a positively charged part in an atom 3. A+BC -> B+AC 4. OH 6. Na 7. elements that give off particles 9. to make an atom happy 12. forms between metals and nonmetals 15. when temp. is constant and pressure increases ,volume? 16. teperature goes up so does the volume 17. elements that have characteristics of both metals and nonmetals 20. atoms witha (+ or - ) charg