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Across 1. medium energy, more particle movement, shape can change, same volume, takes shape of container 6. zero between two non-zero digits 8. only works on hydrogen. The electrons move around the nucleus in circular orbit. electron can move between orbits but have to be in orbit 9. Ratio of protons to neutrons is too low 11. zero before the first Non-zero digit 16. non-numerical 18. Study of matter and it's changes 21. all wave length of visible light are present 26. groups atoms/ molecules while maintianing the same ratios, ratios that are true for atom/ molecules are als true for moles 27. low energy, low particle movement, maintains A constant shape and volume 29. charged Atom 31. ionic compounds react and cations trade anions 33. one distinct chemical identity 34. Ratio of Protons to neutrons is too high 36. type of atom determined by # of protons 38. element reacts with a compound to produce a different element and compound 41. pull of an atom exerts on its shared electrons 47. atoms sharing electrons to get eight valence electrons. 51. Carbon based compound reacts with 02 to make H20 + C02 52. numerical observations 53. # of protons= # of electrons 55. transfer of energy from nigh energy to low energy 56. representations of the orbitals and electrons that shows where all the electrons are located 57. Acutal ratio of elements in a formula 58. region of space where electrons are likely to be indavidual 59. change that alters the chemical identity of the substance 60. how close to the true or accepted value A measurement is

Down 2. atoms of same element with different mass # 3. lowest possible energy 4. # of grams for one mole of a substance. 5. occurs when the nucleus is too large 7. zero after the last non-zero digit 10. each orbital can hold a maximum of two electrons 1 spin up 1 spin down. 12. higher energy less stable the ground state 13. high energy, most practical movement, takes shape and volume of container 14. group of atoms connect and have A single chemical identity 15. non uniform composition 17. Matter not created or destroyed 19. Multiple reactants combine to make one main products 20. patial charges on the atoms or moloecules due to the unequal sharing of electrons 22. electrons in the subshells summarized as an exponent on the subshells 23. one reactant breaks into multiple products 24. uniform composition 25. only certain wavelengths are present 28. charge or electronic attraction between a cation and an anion 30. anything that takes up space and has mass 32. set of orbital of as certain type 35. multiple chemical identities 37. 'now repeatable A measurement is 39. atom share electrons to get a full valance shell. 40. electrons fill orbitals from lowest to highest energy 42. Negatively charged ion 43. reactions where the composition and the nucleus changes 44. Study of mathematical relationships of chemical reactions 45. lowest whole number ratio of elements in a formula 46. energy can only occur in multiple of constant X frequency 48. positively charged ion 49. change that maintains the chemical identity of the substance and phase change dissolving 50. when filling a subshell, each orbital must get 1 electron before getting 2 electrons 54. The amount of matter in A given substance