Across
- 5. energy released during an nuclear reaction
- 6. The process of changing from a solid to a gas, or from a gas to a solid, without passing through an intermediate liquid phase
- 8. positive electrode in an electrolytic cell, toward which negatively charged particles are attracted
- 10. The force with which an object near the Earth or another celestial body is attracted toward the center of the body by gravity
- 15. A group of two or more atoms linked together by sharing electrons in a chemical bond
- 21. Any of the forms, recurring in cycles
- 22. A chemical bond formed between two ions with opposite charges
- 25. Relating to a solution that is unable to dissolve more of a solute
- 26. The continuance of a physical quantity, such as mass, in the same amount during a physical or chemical change
- 27. One of two or more atoms that have the same number of protons but a different number of neutrons
- 29. Any of the various reddish-brown oxides of iron that form on iron and many of its alloys when they are exposed to oxygen in the presence of moisture
- 30. A table in which the chemical elements are arranged in order of increasing atomic number
- 31. The force of attraction that holds molecules of a given substance together
- 34. A release of matter or energy, especially electrical energy
- 35. An atom or a group of atoms that has an electric charge A chemical bond formed between two ions with opposite charges
- 37. Energy in the form of electromagnetic waves or streams of particles such as photons or electrons
- 41. The transfer of heat energy through liquids and gases by the movement of molecules
- 45. instrument used to measure temperature
- 46. colorless, odorless gas that is present in the atmosphere and is formed when any fuel containing carbon is burned
- 49. Capable of being dissolved
- 52. Water droplets that condense from the air on cool surfaces
- 54. A measure of the amount of matter contained in a physical body
- 56. The smallest unit of an element, consisting of protons and neutrons in a dense central nucleus
- 57. describing an object by senses
- 59. number of protons in the nucleus of an atom
- 60. substance made up of two or more elements joined by chemical bonds into a molecule
- 63. A substance that cannot be broken down into simpler substances by chemical means
- 64. A deposit of tiny ice crystals on a surface
- 66. A class of compounds that contain hydroxyl ions and are capable of neutralizing acids in solution
- 71. To make a substance less concentrated by adding a liquid such as water
- 73. A stable subatomic particle that has a positive electric charge and is part of the nucleus of an atom
- 74. average mass of a chemical element
- 75. To change from a liquid to a gas by heating
- 79. An increase in size, volume, or quantity, usually due to heating
- 80. One of the three basic forms of matter, composed of molecules that have little or no ability to exchange places with a fixed shape
- 82. One of the three basic forms of matter, composed of molecules that can move short distances, takes the shape of its container
- 84. A measure of the compactness of a substance
- 85. A measure of the average kinetic energy of atoms or molecules (how hot or cold)
- 86. A nonmetallic element that makes up about 78 percent of the atmosphere by volume, occurring as a colorless, odorless gas
- 87. Amount out of 100
- 89. An instrument used to measure the density of a liquid as compared to that of water
- 90. composition of two or more substances that are not chemically combined with each other and are capable of being separated
- 91. A stable subatomic particle with a negative electric charge
- 92. one of the principal conditions in which matter exists
- 95. Having the electric charge of an electron
- 97. A material or an object that conducts heat, electricity, light, or sound
- 98. To remain suspended within or on the surface of a liquid without sinking
- 99. change from a solid to a liquid by heating or being heated to the melting point
- 100. Any of the six gases helium, neon, argon, krypton, xenon and radon
Down
- 1. properties that have a number
- 2. A proton or neutron especially as part of an atomic nucleus
- 3. The temperature at which a liquid becomes a solid
- 4. The flow of energy through a substance
- 7. something that occupies space and has mass
- 9. movement of ions or molecules from an area of higher concentration to an area of lower concentration
- 11. Any of a group of soft metals that form alkali solutions when they combine with water
- 12. changing from a gas to a liquid by removing heat
- 13. A substance, such as air or water, in which the atoms or molecules can freely move past one another
- 14. A colorless, odorless, highly flammable gaseous element that is the lightest and most abundant element in the universe
- 16. The temperature that a liquid changes to a vapor or gas
- 17. Chemical that acts like a base and reacts strongly with acids
- 18. The gaseous state of a substance that is liquid at room temperature
- 19. A set of symbols showing the composition of a chemical compound
- 20. The amount of a particular substance in a given amount of another substance
- 23. A force of attraction that holds atoms or ions together in a molecule or crystal
- 24. To pass or cause to pass into solution
- 28. The scientific study of the structure, properties, and reactions of the chemical elements and the compounds they form
- 32. An electrically neutral subatomic particle that is part of the nucleus of an atom and has a mass slightly greater than that of a proton
- 33. temperature in which a solid melts
- 34. Solid carbon dioxide, it evaporates without first passing through a liquid state by a process known as sublimation
- 36. The breaking down or destruction of a material, especially a metal, through chemical reactions
- 38. To cover or surround with a material that prevents the loss or transfer of heat, electricity, or sound
- 39. Colorless, odorless, tasteless mixture of gases that surrounds Earth
- 40. A flowing movement
- 42. technique used to separate the components of a chemical mixture by moving the mixture along a stationary material
- 43. Any of a large group of elements that conduct heat and electricity well
- 44. total number of protons and neutrons in the nucleus of an atom
- 47. mass giving of a given atom or molecule, expressed in atomic mass units
- 48. The amount of space occupied by a 3-D object
- 50. change a liquid into a solid or nearly solid mass (blood)
- 51. property of all particles of matter that determines whether they are attracted to or repulsed by other particles
- 53. white crystalline compound
- 55. a process which changes matter into a different substance
- 58. One of the three basic forms of matter, composed of molecules in constant random motion
- 61. The temperature at which air becomes saturated with water vapor and dew forms
- 62. A rearrangement of the atoms or molecules of two or more substances that come into contact with each other resulting in the formation of one or more new substances
- 65. substance participating in a chemical reaction, especially one present at the start of the reaction
- 67. continuous process by which carbon is exchanged between organisms and the environment
- 68. Having the electric charge of a proton
- 69. To add an electron to or remove an electron from an atom or group of atoms so as to give it an electric charge
- 70. a chemical bond that involves the sharing of electron pairs between atoms
- 72. The process of burning (a chemical change)
- 75. The upward force that a fluid exerts on an object that is less dense than itself
- 76. chemical combination of a substance with oxygen A nonmetal element that exists in its free form as as a colorless, odorless gas and makes up about 21 percent of Earth’s atmosphere
- 77. An instrument that measures the humidity in the air
- 78. The change of a liquid into a vapor at a temperature below the boiling point
- 81. Water in its gaseous state
- 83. Having positive electric charges exactly balanced by negative electric charges
- 88. how something feels
- 93. relating to heat
- 94. A metallic substance made by mixing ad fusing two or more metals to obtain desirable qualities
- 96. A form of energy produced by the motion of molecules
- 98. change from a liquid to a solid state by cooling or being cooled to the freezing point