Across
- 1. a change that creates a new substance.
- 4. a change that does not affect the identity of the substance.
- 11. releases energy in the form of heat.
- 13. lasting attraction between atoms that enables the formation of chemical compounds.
- 14. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- 16. average mass of all atoms.
- 17. reaction 1 element and 1 compound form a new element and new compound.
- 18. particles with in the atom protons, neutrons, and electrons.
- 22. can be observed without channeling the substance.
- 23. reaction 2 compounds form 2 new compounds.
- 25. obsorbs energy in the form of heat.
- 28. how compact an object is.
- 29. the statement that when atoms combine to form molecules they generally each lose, gain, or share valence electrons.
- 30. equal number of atoms both sides of the arrow.
- 32. the substances before the change, written on the left side of the arrow.
- 34. a proposition assumed as a premise in an argument.
- 35. a variable whose value depends on that of another.
- 36. the act of trying, testing, or putting to the proof.
- 37. rounded atomic mass.
- 38. a vertical column in the Periodic Table.
- 39. a chemical change that produces a new substance.
- 44. simplest form of the species.
- 46. smallest form of an element that consists of a nucleus, protons, neutrons.
- 47. parts of a mixture look different or distinguishable.
- 49. are regions of space around the nucleus of an atom where an electron is likely to be found.
- 50. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
- 51. A chemical bond formed by the sharing of one or more electrons.
- 52. name given to a horizontal row of the periodic table.
- 53. 2 elements that form a compound.
- 54. A chemical bond formed between two ions with opposite charges.
- 56. the parts of the mixture look the same.
- 57. an element or substance that is not a metal.
- 58. the substance after the change has occurred, written on the right side of the arrow.
- 59. location of protons and neutrons.
- 60. a vertical column in the Periodic Table.
Down
- 2. A compound is a substance made up of a definite proportion of two or more elements.
- 3. ionic species having a negative charge.
- 5. identifies the element.
- 6. the elements have a repeating pattern that alow them to be placed in groups and periods.
- 7. producing the desired result; effective.
- 8. 1 compound that forms 2 elements.
- 9. an element, feature, or factor that is liable to vary or change.
- 10. 2 or more atoms chemically combined.
- 12. hydrocarbon and oxygen form water and carbon dioxide.
- 15. a variable that is used to regulate the flow of control, or order of execution, generally the number of times a loop will execute.
- 19. describes how a substances changes into a new substance.
- 20. make a reaction go faster but does not get used up in a reaction.
- 21. a particle with no electric charge.
- 24. 2 or more atoms/compounds physically combined.
- 26. a variable whose variation does not depend on that of another.
- 27. a molecular ion, is a charged chemical species.
- 31. shows the reactants and products using symbols.
- 33. a positively charged ion, i.e., one that would be attracted to the cathode in electrolysis
- 40. an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. They are electrical semiconductors.
- 41. the number in front of the variable.
- 42. same ratio of atoms no matter the size of the substance.
- 43. not changing or varying.
- 45. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
- 48. the energy stored in the bonds of a compound.
- 52. trait or characteristic.
- 55. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.