Chemistry Vocab Crossword

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Across
  1. 2. A type of change that alters the physical properties of a substance.
  2. 8. Group 2A elements in the modern periodic table.
  3. 10. Group 1A elements, except for hydrogen, that are on the left side of the modern periodic table.
  4. 11. Negative Ions, high electronegativity; electron loving.
  5. 13. The energy required to remove first electron from a gaseous atom.
  6. 16. Number of electrons in an atom
  7. 17. 2 bonds & 2 lone pairs.
  8. 21. A negatively charged particle that moves around the atoms nucleus
  9. 22. rule States that atoms lose, gains, or shares electrons in order to acquire a full set of 8 valence electrons.
  10. 24. Groups designated with an A following the number.
  11. 26. Atoms can gain or lose one or more electrons to form ions, which results in the atoms acquiring a net charge.
  12. 27. A simple shorthand notation for visually showing valence electrons.
  13. 29. 3 bonds & 1 lone pair
  14. 33. Minimum amount of energy that can be gained or lost by an atom.
  15. 34. An extremely nonreactive 2A element
  16. 37. An atom or bonded group of atoms with a positive or negative charge.
  17. 41. Indicates the relative ability of its atoms to attract electrons in a chemical bond. Increases as you move left to right across a period and up a group.
  18. 44. Groups designated with a B following the number.
  19. 46. A subatomic particle in an atoms nucleus that has a positive charge of 1+.
  20. 47. Pure substance that cannot be broken down into simpler substances by physical or chemical means.
  21. 49. Involves one or more substances changing.
Down
  1. 1. States when the elements are arranged by increasing atomic number, there is a periodic repetition of their chemical and physical properties.
  2. 3. The attractions between oppositely charged region or polar molecules.
  3. 4. Multiple atoms make up the ion.
  4. 5. 4 bonds & 0 lone pairs
  5. 6. Ability or not for a substance to combine with a compound.
  6. 7. 3 bonds & 0 lone pairs
  7. 8. Half the distance between nuclei of identical atoms that are chemically bond together. Increase across period from right to left and down 1 group.
  8. 9. A highly reactive group 7A element.
  9. 12. States that mass is neither created nor destroyed during a chemical reaction.
  10. 14. A neutral subatomic particle in an atoms nucleus that has a mass nearly equal to that of a proton.
  11. 15. state The lowest allowable energy state of an atom.
  12. 18. Elements that are generally gases or dull, brittle solids that are poor conductors of heat and electricity.
  13. 19. An element that is solid at room temperature, a good conductor of heat and electricity.
  14. 20. One atom make up the ion.
  15. 23. A strong dipole - dipole attraction between molecules that contain a hydrogen atom bonded to a small, extremely electronegative atom with at least one lone pair of electrons.
  16. 25. electrons Electrons located in an atoms outermost orbitals or highest principal energy level.
  17. 28. Number of waves that pass a given point per second.
  18. 30. 2 bonds & 0 lone pairs
  19. 31. Atoms of the same element with the same number of protons but different number of neutrons.
  20. 32. A physical property, such as mass length, and volume.
  21. 35. a systematic approach used in scientific study that typically includes observation, hypothesis, experiments, analysis, and conclusion.
  22. 36. An element, such as silicon or germanium, that has physical and chemical properties of both metals and nonmetals.
  23. 38. A physical property that remains the same no matter how much of a substance is present.
  24. 39. A characteristic of matter that can be observed or measured without changing composition.
  25. 40. The weak forces resulting from temporary shifts in the density of electrons in electron clouds.
  26. 42. Positive Ions, low electronegativity; willing to give up electrons.
  27. 43. The smallest particle of an element that retains all the properties of that element.
  28. 45. Shortest distance between equivalent points on a continuous wave.
  29. 48. An extremely small, positively charged atom that contains positive protons, neutrons and surrounded by electrons.