Across
- 1. n=1 is the ___ energy shell
- 5. in a(n) ___, each substance maintains its own properties and composition
- 7. atoms are made up of three ___ ___; electrons, protons and neutrons
- 10. the base unit of measurement for temperature
- 11. ___ properties depend on sample size, ex: shape, volume, mass
- 13. electrons ___ energy when they decay and fall to more stable units
- 15. the closeness of a measurement to the true value
- 16. matter composed of two or more elements that can be separated
- 18. the oxidation ___ increases when an element loses electrons
- 19. a chemical property defined by a substance's ability to harm an organism
- 20. two or more atoms covalently bonded
- 21. ___ forces: the attraction between molecules
- 24. a chemical property defined by the readiness of a chemical to change
- 25. when naming compounds, a(n) ___ is used to represent the subscript of an element in a covalent bond
- 26. a chemical property defined by how much heat is given off when a substance burns
- 28. the electron geometry of a compound with one or two domains
- 30. the ___ represents where electrons could be within an atom
- 31. the result of a permanent dipole
- 36. different substances are chemically ___ in compounds but not in mixtures
- 37. the ___ agent is reduced in a redox reaction
- 39. ___-___ forces: attraction between polar molecules/ permanent dipole
- 40. ___-___ forces: attraction between an ion and a polar molecule
- 43. ___ dipole: when electrons are temporarily more concentrated in one place
- 45. observable events or occurrences
- 46. anything that has mass or takes up space
- 51. the ___ agent is oxidized in a redox reaction
- 52. the only chemical reaction that cannot be redox
- 54. a type of nuclear reaction where two nuclei are combined
- 58. ___ bonds don't belong to any one location
- 60. the base unit of measurement for time
- 61. ___ molecule: composed of only two atoms covalently bonded
- 62. ___ ___ forces: temporary attraction between nonpolar molecules or noble gas
- 63. an ion made of more than one nonmetal but with only one type of charge (ends in -ite or -ate)
- 66. the U.S. ___ System is used by the United States and two other countries
- 67. a type of nuclear reaction where a nucleus is split
- 69. measures the force of gravity on an object
- 74. bonding between H and N, O or F
- 75. metals that contain one kind of cation
- 77. a molecule will have a permanent dipole if the molecular arrangement is ___
- 79. it consists of one single element or type of compound
- 80. electrons ___ energy when they are energized and jump to higher orbits
- 81. ___ forces: the attraction between atoms
- 82. when an element gains electrons in a redox reaction
- 83. ___ properties don't depend on sample size, ex: magnetism, melting points, density
- 85. the ___ System of Units is the primary system used by scientists and includes the 7 base units of measurement
- 86. ___ change: matter moving into different phases without the matter itself changing
- 87. the ___ System is based to the power of 10
Down
- 2. the electron geometry of a compound with four domains
- 3. the base unit of measurement for mass/weight
- 4. a gas changing to a solid
- 6. in a heterogeneous mixture, compounds are mixed ___ within the substance
- 8. a(n) ___ bond is between a metal (cation) and a nonmetal (anion)
- 9. Alkali metals are extremely ___
- 12. the molecular shape of a compound with three bonded atoms and 1 lone electron pair
- 14. a solid changing to a gas
- 17. when an element loses electrons in a redox reaction
- 22. every atom is described by four ___ ___
- 23. the result of an instantaneous or induced dipole
- 27. ___ change: when the molecular structure of a substance is changed
- 29. a model of an atom that can determine the polarity of a molecule
- 32. a substance that cannot be broken down
- 33. a(n) ___ bond is between two nonmetals
- 34. a separation of positive and negative charges
- 35. two different elements ionically bonded (ends in -ide)
- 38. measures the amount of matter an object has
- 41. ___ science investigates and explains natural phenomena
- 42. a chemical property defined by the irreversible damage of a material due to a chemical reaction
- 44. ___ reactions produce energy by changing elements' identities
- 45. a basic particle representing a quantum of energy (E)
- 47. ___ radiation: a form of light that that moves in a wavelike motion
- 48. ___ dipole: a polar molecule repels an atom's or nonpolar molecule's electrons
- 49. l represents the ___ ___ quantum number
- 50. a(n) ___ reaction involves the transfer of electrons
- 52. a chemical property defined by the ability of a compound to be broken down into elements or other compounds
- 53. the molecular shape of a compound with two bonded atoms and two lone electron pairs
- 55. ___ observations are verified by experimentation or experience rather than theory
- 56. carbon-14 is a(n) ___ of carbon
- 57. ice floats in water because ice is less ___ than water
- 59. fission is ___ powerful than fusion
- 61. ___ forces: the weakest of all molecular interactions (A.K.A Van der Waal's Forces)
- 64. the the tendency of an atom to attract electrons
- 65. the consistency of a set of measurements
- 68. the electron geometry of a compound with three domains
- 70. ___ dipole: occurs when two atoms in a molecule have vary different electronegativities. One atom attracts electrons more than another, becoming more -, while the other atom becomes more +
- 71. measures the amount of space and object occupies, ex: gallons, fluid ounces, liters
- 72. the net charge within a molecule
- 73. the base unit of measurement for length
- 76. a chemical property defined by how easily a substance can light on fire
- 78. in a homogeneous mixture, compounds are mixed ___ within the substance
- 84. mass is not affected by ___, but weight is
- 87. the base unit of measurement for volume