Across
- 2. (2,8,8,2) electron density
- 4. the number of protons within an atom
- 6. reaction when energy is being released; makes substance warmer
- 7. a smallest part of an element
- 8. something made up of 2 or more different elements
- 9. far right in P.T. not good conductors of neat or electricity, brittle
- 11. shares characteristics of both metals and non-metals
- 16. central part (core) of the atom, contains protons and neutrons
- 17. atoms in the outermost orbital
- 21. chemist who created P.T. Table
- 24. positively charged atoms
- 25. gas Group 18: He, Ne, Ar, Kr, Xe, Rn, maximum number of valence electrons
Down
- 1. the result of the reaction. Right side of chart
- 3. nothing is created nor destroyed by chemical reactions or physical transformations.
- 5. substances used to make products. Left side of chart
- 10. reaction when energy is being absorbed; makes substance colder
- 12. a representation of an element
- 13. collumns on the P.T. table (18 collumns)
- 14. a group of atoms, small
- 15. the process of putting an outer coating on sowmthing to make the object last longer
- 18. negatively charged atoms
- 19. the number of protons atom
- 20. 1 substance in its pure form, can't be broken down any further
- 22. Greta conductors of heat and electricity, hard
- 23. neutrally charged atoms
- 24. rows on P.T., atomic number increases from left to right