Across
- 1. level Fixed amount of energy
- 6. A basic unit of a chemical element
- 8. cloud A region of negative charge surrounding an atomic nucleus
- 10. column of the periodic table
- 11. Lowest energy state
- 12. Electrons electrons on the outer shell of an atom
- 13. low thermal and electrical conductivity
- 15. Number total number of protons and neutrons
- 16. emitting ionizing radiation or particles
- 18. Metals soft and shiny, low melting point
- 19. subatomic particle with electric charge
- 22. Subatomic particle with a negative change
- 23. Theory Basis of modern physics
- 24. stable subatomic particle
- 25. Metals two shells of valence electrons
- 27. A substance made by mixing other substances togethe
- 28. properties intermediate with metals and non metals
- 31. Number number of protons or neutrons in an atom
- 32. change Positive or negative
- 33. atoms with the same number of protons but different numbers of neutrons
Down
- 2. Substance that cant be broken by chemical means
- 3. nonmetallic yet contain acidic compounds
- 4. something composed of two or more elements
- 5. an atom or molecule with a net electric charge due to a loss or gain of electric charge
- 7. high thermal and electrical conductivity
- 9. Gases seven chemical elements of group 18
- 14. Mass Unit unit for expressing atomic mass
- 17. change A Change in elements
- 20. repeating after a fixed interval
- 21. table array of all chemical elements
- 26. horizontal rows of the periodic table
- 29. Earth Metals good conductors, electropositive
- 30. of Atom contains protons and neutrons