Across
- 3. Atoms are made up of:
- 8. Atoms with different numbers of protons are:
- 9. (Two words) where the electrons are in an atom
- 11. (Two words) a unique single upper-case letter or upper-case plus lower-case letter symbol
- 12. As a result, the __________ observed when a substance is heated in a flame may be used as a means of identification.
- 13. An atom that has gained or lost one or more electrons
- 14. (Three words) mass number subtracted by the number of protons
- 15. Atoms with a negative charge (More electrons than protons)
- 16. sub-atomic particle with a zero charge and has an atomic mass of 1 amu
- 19. atomic mass unit
- 20. Light of 400 nm is seen as ________ and light of 700 nm is seen as red.
- 22. (Two words) speed of light = wavelength * frequency
- 24. Everything is made up of:
- 26. sub-atomic particle with a -1 charge and has an atomic mass of 0.00054 amu
- 27. 6.626*10^-34 Js
- 29. (Three words) Observed when a substance is heated in a flame varies from one substance to another
- 31. 1/seconds
- 32. Atoms with the same number of protons but different number of electrons
- 34. At the center of every atom
- 35. (Three words) each element's ___________ is unique and can be used to identify it.
- 36. (Two words) The number of protons referred to as the letter Z
- 37. (Two words) of a photon; E=hv
- 38. speed of light divided by frequency
- 39. Below a certain frequency, no electrons will eject no matter the _________ of the light.
- 40. 3.00*10^8 m/s
- 42. (Two words) All _______, including visible light, travel at the speed of visible light in a vacuum.
Down
- 1. Fill in the blank: The number written as a right superscript in the full Atomic symbol is the:
- 2. frequency is measured in:
- 4. (Three words) The number of protons and neutrons added together represented by the letter A
- 5. (Three words) Less protons than electrons in an atom leads to a:
- 6. written as v or f in an equation
- 7. (Two words) Spans the wavelength region from 400 to 700 nm
- 10. (Two words) A temporary position of higher energy that an electron enters during a reactions
- 17. Atoms with a positive charge (Fewer electrons than protons)
- 18. nanometers
- 19. (Two words) Depends on just three numbers: the number of protons, the number of neutrons, and the number of electrons
- 21. sub-atomic particle with a +1 charge and has an atomic mass of 1 amu
- 23. (Two words) Described in terms of its wavelength
- 25. Minimum amount of energy that can be gained or lost by an atom
- 28. wavelength is measured in:
- 30. (Three words) Less electrons than protons in an atom leads to a:
- 33. (Two words) A position of the lowest energy possible
- 35. Atoms ________ energy and become excited.
- 40. Because each element has a different _________ of electron energy levels, the possible electron transition for a given substance are unique.
- 41. Light at a certain frequency causes metals to ______ their electrons.