Across
- 4. negatively charged particle
- 6. smallest component of an element
- 7. elctron located outermost shell of atom (2 words)
- 10. a wave describing state of single electron in atom
- 12. mass of an element (2)
- 13. a substance obtained from another substance through chemical Change
- 14. columns on the pt of elements
- 15. group on pt including all alkali metal, alkaline earth metals and others
- 16. substance composed of two or more elements whose constant
- 18. chemical change with heat going in
- 19. particle with no charge
- 22. was a Russian chemist (2 words)
- 25. 1 or 2 letters referred to elements
Down
- 1. chemical change with heat going out
- 2. positively charged particle
- 3. includes helium, neon,argon, krypton, xenun, radon
- 5. law saying that mass in isolated system is neither created or destroyed by chemical change
- 8. horizontal row of elements on pt
- 9. group including boron, silicon, germanium, arsenic, antimony, tellurium
- 11. number of electrons or protons (2)
- 17. coating or layer of material esp mass
- 18. one class substances that can't be separated simpler
- 20. central part of atom
- 21. any substance that undergoes chemistry change in given reaction
- 23. smallest physic, unit of an element of compound w/ one or more atoms
- 24. includes carbon, nitrogen, oxygen, phosphorus, sulfur, and selenium