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