Chemistry Crossword Puzzle

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Across
  1. 4. Light at a certain frequency causes metal to ___ their electrons
  2. 5. A model of the atom had negatively-charged electrons embedded within a positively-charged "soup."
  3. 6. What kinds of particles are atoms made up of?
  4. 8. An atom that has gained or lost one or more electrons
  5. 9. The visible _____ spans the wavelength region from 400 to 700 nm.
  6. 11. A flame test is a _______ test for the ID of an unknown
  7. 17. Atomic symbol is W
  8. 20. The ____ of light observed when a substance is heated from one substance to another.
  9. 22. Atoms with different numbers of protons, each with its own atomic symbol
  10. 24. Electrons do _____ out the positive charge of the protons in the nucleus
  11. 25. Atoms are mostly _____ _____?
  12. 29. ELectrons do not ___ anything to the mass number
  13. 30. What kinds of electrons are normally at ground state
  14. 31. Certain other isotopes which are unstable, that is, ______.
  15. 32. When atoms absorb energy and become ___?
  16. 33. A unique single upper-case letter or upper-case plus one lowercase letter symbol
  17. 36. When we think of atoms, it’s useful to think of them first as ______ ______.
  18. 41. Every atom’s nucleus is _____ by electrons
  19. 42. Atomic symbol is Ne
  20. 43. All _________ waves, including visible light, travel at the speed of 300*10^8
  21. 45. One billionth of a meter.
  22. 46. Whose experiment included the shooting of alpha particles at a very thin sheet of gold foil?
  23. 47. Atoms with a negative charge and have more electrons than protons
Down
  1. 1. Minimum amount of energy that can be gained or lost by an atom
  2. 2. A tiny object made entire of protons and neutrons
  3. 3. Sub-atomic particles with a zero charge (they are neutral) and a mass of 1 atomic mass unit (amu)
  4. 7. Made up of sub-atomic particles
  5. 10. Atoms with a positive charge and have fewer electrons than protons
  6. 12. The number of protons plus the number of neutrons equals the______ ___ ______?
  7. 13. Atoms with the same number of protons but different number of neutrons
  8. 14. From excited energy levels, there is a natural tendency for the electrons to make a transition or drop back down the ______ ______.
  9. 15. When a substance is heated in a flame, the atoms _____ energy from the flame.
  10. 16. Atomic symbol is H
  11. 18. All _____ is made up of atoms.
  12. 19. Most of the alpha particles pass through the gold foil _______.
  13. 21. Ions have a ___ _______ charge calculated buy adding up all positive charges for the protons with all negative charges of the electrons.
  14. 22. Even smaller sub-atomic particles than protons and neutrons with a -1 charge and a tiny mass (0.00054 amu).
  15. 23. Acronym for the colors of the visible light spectrum, in order from long wavelength to short.
  16. 26. When an electron makes a transition from a higher energy lebel to a lower energy legal, this particle of light is emitted.
  17. 27. Metal cation is K
  18. 28. In order to be a neutral, an atom has to have the ____ number of electrons as protons
  19. 34. Mass of 28
  20. 35. Below a certain frequency, no electrons will eject no matter the _______ of the light
  21. 37. Each element’s AES is _______ and can be used to identify it.
  22. 38. Wavelength * frequency
  23. 39. Number of protons referred to is called a(n) ____ ______? The letter Z is used to represent it
  24. 40. ________ shorten= frequency increases
  25. 44. Sub-atomic particles with a +1 charge and a mass of about 1 atomic mass unit (amu)