Across
- 2. an element that has factors of both metals and nonmetals
- 4. we're made of billions of these
- 6. aka a family on the periodic table
- 8. has a negative electric charge
- 9. russian chemist who developed the periodic table
- 10. a substance that changes during a reaction
- 11. an electron associated with an atom
- 15. the mass of an atom of a element
- 16. studied the atom and electron
- 18. the center of an atom
- 19. typically hard, shiny, ductile
- 20. formed in an atom or molecule by one or more electrons
- 22. absorption of heat
- 26. abbreviation of an element
- 27. has no electric charge
Down
- 1. mass is neither created nor destroyed by reaction
- 3. a substance deposited in solid from solution
- 5. an element that is not a metal
- 7. each numbered row is this
- 12. the number of protons in the nucleus of an atom
- 13. there are 118 of these on the back wall
- 14. has a positive electric charge
- 17. release of heat
- 21. any of the gaseous elements on the periodic table
- 23. group of atoms bonded together
- 24. composed of two or more elements
- 25. a new material formed in a chemical reaction