Across
- 1. A liquid substance capable of dissolving other substances
- 7. the formation of products from reactants
- 9. The product of an object's mass and velocity
- 12. a measure of the force exerted by a gas above a liquid
- 15. A combination of chemical symbols and numbers to represent a substance
- 16. horizontal row in the periodic table
- 19. a process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation
- 20. A change in matter that produces one or more new substances
- 23. positively charged ion (lost electrons)
- 28. The temperature at which a liquid changes to a gas
- 30. A chemical reaction in which energy is absorbed.
- 31. positively charged particle that determines the type of element
- 32. A negatively charged ion (gained electrons)
- 34. Distance and direction of an object's change in position from the starting point.
- 36. a type of collision in which the kinetic energy after the collision is less than the kinetic energy before the collision
- 39. A measure of the average energy of motion of the particles of a substance.
- 41. How readily a substance combines chemically with other substances.
- 43. The original chemical reactant in a radioactive decay equation which decays into daughter elements.
- 45. Electrons on the outermost energy level (shell) of an atom
- 46. Energy that is radiated or transmitted in the form of rays or waves or particles.
- 47. A liquid's resistance to flowing
- 49. Energy needed to get a reaction started
- 57. a push or pull on an object
- 58. A measurement of how much solute exists within a certain volume of solvent
- 59. the amount of matter in an object
- 60. substance that speeds up the rate of a chemical reaction by lowering activation energy
- 62. For a reaction to occur, the particles must collide, they must collide with the appropriate orientation, and they must collide with sufficient energy.
- 64. A device used to measure current in a circuit
- 65. forces of attraction between molecules
- 66. A substance made up of atoms of two or more different elements joined by chemical bonds
- 67. How far an object moves
- 70. Vertical column in the periodic table
- 71. one-half the distance between the nuclei of two atoms of the same element when the atoms are joined
- 72. Creation of energy by joining the nuclei of two atoms.
- 73. A quantity that has magnitude and direction
- 74. center of an atom contains protons and neutrons
- 75. Forces that produce a nonzero net force, causes acceleration
- 76. The measurement of the outer surface of an object.
- 77. length of time required for half of the radioactive atoms in a sample to decay
- 78. Zero net force causes constant velocity (can be at rest or moving)
- 79. A substance produced in a chemical reaction
Down
- 2. A pure substance made of only one kind of atom
- 3. A physical quantity that has magnitude only.
- 4. The tendency of an object to resist a change in motion
- 5. The splitting of an atomic nucleus to release energy.
- 6. unit of electric current
- 8. the process by which one or more substances change to produce one or more different substances
- 9. the amount of matter in an object
- 10. The temperature at which a solid becomes a liquid
- 11. the force of gravity on an object
- 13. The reaction that forms reactants from products.
- 14. A situation in which two objects in close contact exchange energy.
- 17. A chemical substance that is present at the start of a chemical reaction
- 18. Isotopes that have unstable nuclei and undergo radioactive decay.
- 21. The distance an object travels per unit of time
- 22. Chemical Reaction in which energy is given off, primarily in the form of heat
- 24. SI unit of force
- 25. A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
- 26. small portion of matter
- 27. A change in a substance that does not involve a change in the identity of the substance
- 29. The overall force on an object when all the individual forces acting on it are added together
- 33. the ability of an atom to attract electrons when the atom is in a compound
- 35. one in which there is no net loss of total kinetic energy
- 37. When a stress is applied to a system at equilibrium, the equilibrium shifts to relieve the stress
- 38. A flow of electric charge.
- 40. How readily a substance combines chemically with other substances.
- 42. the speed and direction of a moving object
- 43. a change from one state (solid or liquid or gas) to another without a change in chemical composition
- 44. Change in velocity divided by the time it takes for the change to occur can be speeding up, slowing down, or changing direction
- 48. the force that acts on the surface of a liquid and that tends to minimize the area of the surface
- 50. the energy an object has due to its motion
- 51. the force that holds two atoms together
- 52. In a chemical reaction, the state in which the rate of the forward reaction equals the rate of the reverse reaction, so that the relative concentrations of the reactants and products do not change with time.
- 53. Every object in the universe attracts every other object
- 54. the change in concentration of a reactant or product per unit time
- 55. the powerful attractive force that binds protons and neutrons together in the nucleus
- 56. A substance that is dissolved in a solution.
- 61. a changing magnetic field creates an electric current
- 62. A substance made up of atoms of two or more different elements joined by chemical bonds
- 63. the number of protons in an atom
- 68. change in momentum
- 69. The chemical product in a radioactive decay equation produced from decayed parent elements.