Across
- 2. shows shared pair of elections as a dash
- 6. can be observed without changing the substance
- 9. a pair of electrons not being shared
- 10. two or more atoms specifically arranged
- 12. the substance after the change has occurred, written on the right side of the arrow
- 15. when elements transfer electrons, they occur between a metal and a non-metal
- 18. a diagram that shows the number of valance electrons as dots around the symbol
- 21. a neutral subatomic particle
- 23. of average kinetic energy of particles in a substance
- 29. a positively charged particle
- 33. A quality that is unknown but assumed to have a fixed value in a specified mathematical context.
- 37. a chemical change that produces a new substance
- 38. the law that the properties of the elements are periodic functions of their atomic numbers
- 39. an idea or explanation that you then test through study and experimentation
- 40. when one element and one compound form a new element and a new compound
- 47. Different atoms of a chemical element in the periodic table all have the same number of protons, but may have a different number of neutrons in their nuclei.
- 49. when one compound forms two or more elements
- 50. an element that readily forms positive ions and has metallic bonds.
- 52. when all atoms want eight valance electrons like the noble gasses
- 53. when two atoms each share one bond
- 54. the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are giving the left hand side and the product entities on the right hand side
- 55. an ion with more than one atom, has a charge, and acts like a single unit
- 59. bond when one atom gives both electrons that are shared between two atoms
- 61. average mass of all atoms
- 62. solid to liquid
- 63. a negatively charged particle
- 64. the solid formed from the mixing of two liquids
- 66. a positively charged ion
- 67. of energy from higher temp to lower temp
- 69. any chemical element which has properties in between those of metals and non metals, or that has a mixture of them.
- 70. when two elements share or transfer electrons making a new substance called a compound.
- 72. The electrons in the outermost region of the electron cloud
- 73. solid to gas
- 74. identifies the element
- 75. an element that doesn't have the characteristics of metal including: ability to conduct heat or electricity, luster, or flexibility
- 76. two or more atoms/compounds physically combined
Down
- 1. when the parts of the mixture blend evenly together and are no longer distinguishable
- 3. a scientific test
- 4. a number or symbol multiplied with a variable or an unknown quantity in an algebraic term. 4x The four is the coefficient.
- 5. liquid to solid
- 6. any of the seven horizontal rows that contain elements arranged in order of increasing atomic number.
- 7. when two atoms each share three bonds.
- 8. when something is true
- 11. a change that does not affect the identity of the substance
- 13. when elements share electrons, occurs between two non-metals
- 14. particles within the atom; neutrons and electrons
- 16. an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons.
- 17. when two elements form a compound
- 18. when two compounds from two new compounds
- 19. Hydrocarbon and oxygen form water and carbon dioxide
- 20. formed when electrons are shared between two atoms
- 22. color, hardness, boiling point, etc, a property of matter not involving in its manifestation a chemical change.
- 24. it absorbs energy usually in the form of heat
- 25. the simplest form of that species
- 26. or description of an object
- 27. the variable that is changed or controlled in a scientific experiment.
- 28. describes how a substance changes into a new substance
- 30. when two atoms each share two bonds
- 31. Liquid to gas
- 32. has an equal number of atoms on both sides of the arrow
- 34. the variable is the one that is manipulated or changed by the scientist.
- 35. rounded atomic mass
- 36. something that speeds up the reaction, but is not used up
- 41. the location of protons and neutrons
- 42. the energy stored in the bonds of a compound
- 43. it releases energy usually in the form of heat
- 44. a substance with the same ratio of atoms no matter the size of the substance
- 45. smallest from of an element that consists of a nucleus, protons, neutrons, electrons, and orbitals
- 46. the variable being tested in a scientific experiment, the one being measured
- 48. a change that creates a new substance
- 51. measure of the total kinetic energy of particles in a substance
- 56. usually statistics, used as a constant and unchanging standard of comparison
- 57. -mixture when the parts of the mixture do not blend together, they are easily distinguishable
- 58. gas to liquid
- 59. two or more atoms chemicals combined
- 60. mass divided by volume, how compact an object is
- 65. the substance before the chance, written on the left side of the arrow
- 68. a wave of function describing the state of a single electron in an atom or in a molecule
- 71. a negatively charged ion