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