Across
- 6. combination of two or more substances
- 7. energy levels=periods on Periodic Table
- 10. protons+neutrons=
- 14. ions are formed when metals react with _______
- 16. group of two or more atoms bonded together
- 17. anions are _____
- 20. neutrons have __ charge
- 21. sub-levels=sections on Periodic Table
- 22. line spectrum: only certain energies of light are ____ by the source
- 23. substance made up of only one type of atom
- 24. ____ discovered electrons in 1897
- 27. basic building block of matter
- 28. atoms of the same element with different number of neutrons
- 29. _____ is both a wave and a particle
- 30. number of waves that pass a point in one second
Down
- 1. substance only contains one type of molecule or aatom
- 2. # of protons is the same as
- 3. change ____, element changes
- 4. atoms or molecules with a (positive or negative) charge
- 5. distance from peak to peak
- 8. change ____, charge changes
- 9. shows distinct lines at specific wavelengths
- 10. cations are almost always ____
- 11. spectrum with a whole range of colors
- 12. light is a form of
- 13. cations are _____
- 15. two or more atoms bonded together
- 18. average of all the isotopes
- 19. all _____ is composed of tiny, indivisible particles called atoms
- 25. 's atomic theory
- 26. substance formed by chemically combining two or more elements