Across
- 5. a chemical bond that involves the sharing of electron pairs between atoms
- 6. the law that the properties of the elements are periodic functions of their atomic numbers
- 8. the total number of protons and neutrons
- 9. a substance that takes part in and undergoes change during a reaction
- 10. properties are intermediate between those of metals and solid nonmetals. They are electrical semiconductors.
- 12. a non solid material
- 15. can include changing the color, shape, state of matter, or volume of a substance.
- 18. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
- 19. when two ions bond
- 20. a particle smaller than an atom
- 21. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
- 22. is energy stored in the bonds
- 28. single column
- 31. a combination of two or more pure substances
- 34. characteristic of something
- 37. a stable subatomic particle occurring in all atomic nucle
- 39. positive charged core of an atom
- 42. does not depend on that of another
- 43. type of chemical reaction where two compounds react, and the positive ions and the negative ions of the two reactants switch places
- 45. an exothermic reaction in which something reacts with oxygen
- 47. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change
- 49. absorbs
- 50. a substance consisting of atoms which all have the same number of protons
- 51. a quantity obtained by multiplying quantities together
- 54. legally sound, effective, or binding
- 55. smallest form of an element
- 56. a solid material
- 57. a stable subatomic particle with a charge of negative electricity
- 59. the bond between two chemicals
- 60. a material system made up of two or more different substances
Down
- 1. a tryout or experiment to test quality, value, or usefulness
- 2. a molecular ion, is a charged chemical species
- 3. quantity that is unknown but assumed to have a fixed value in a specified mathematical context
- 4. substance a definite and constant composition
- 7. a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed
- 11. total number of protons and neutron is a neucleus
- 13. equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side
- 14. chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine
- 16. is a type of chemical reaction where one element replaces another element in a compound.
- 17. designed to minimize the effects of variables other than the independent variable
- 23. puts out
- 24. a set of chemical symbols showing the elements present in a compound and their relative proportions
- 25. chemical reaction in which a single compound breaks down into two or more elements or new compounds
- 26. educated guess
- 27. depends on that of another
- 29. constant term related to the properties of a product
- 30. a positively charged ion,
- 32. a positively charged ion,
- 33. A mixture which has uniform composition and properties throughout
- 35. chemical reaction in which two or more simple substances combine to form a more complex product
- 36. liable to change
- 38. allow atoms to make covalent bonds
- 40. a subatomic particle of about the same mass as a proton but without an electric charge
- 41. the symbolic representation of a chemical reaction in the form of symbols and formulae
- 44. can be observed or measured without changing the composition of matter
- 46. is any change that results in the formation of new chemical substances
- 48. the amount of protons in a neucleus
- 52. The mass of atoms, their size, and how they are arranged
- 53. a substance formed when two or more chemical elements
- 58. a group of similar elements