Chemistry Crossword Chapters 1 & 2

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Across
  1. 3. a group of two or more atoms that are linked together by chemical bonds; the smallest particle that characterizes a compound.
  2. 4. a subatomic particle representing the basic unit of a negative charge
  3. 5. sum of protons and neutrons in a nucleus
  4. 6. a record of the distribution of particles in a sample according to mass
  5. 9. a substance which cannot be broken down into simpler substances by ordinary chemical means
  6. 10. characteristics
  7. 13. the branch of science that deals with the study of the composition, structure, and properties of matter and the changes that matter undergoes
  8. 15. process of purifying a liquid by boiling and collecting vapor
  9. 18. the temperature at which a solid changes into a liquid; the vapor pressures of solid and liquid are equal at this temperature
  10. 21. a substance which can be broken down by chemical means into simpler substances
  11. 22. subatomic particle which protons, neutrons, and other particles are thought to be composed of.
  12. 23. process of separating mixtures by taking advantage of their differing solubilities in a given solvent
  13. 31. the energy possessed by matter due to its motion
  14. 33. a technique used to separate components of mixtures based on their differing solubilities or interactions with a stationary liquid or solid phase
  15. 35. the temperature at which a liquid is changed into a gas; the vapor pressure of a liquid and gas are equal at this temperature
  16. 38. the small, dense, center of an atom
  17. 40. a quantity described as the randomness of a substance or system
Down
  1. 1. the mass per unit volume of a substance
  2. 2. a grouping of elemental symbols which tells not only what types of atoms compose the compound but also the number of each type of atom in one molecule of the compound
  3. 3. an instrument used to determine the isotopes present in an element
  4. 4. a reaction in which the products have a lower heat energy content than the reactants
  5. 7. a class of matter that is homogeneous, of definite composition, and has its own unique properties which make it different from every other substance, it may either be an element or a compound.
  6. 8. change a change in the physical appearance of matter but not in the identity
  7. 11. average mass of atoms of an element relative to carbon-12 isotope
  8. 12. a measure of the force of gravity upon an object
  9. 14. the materials that compose the physical universe, anything that has mass and occupies space
  10. 16. a reaction in which the products have a higher heat energy content than the reactants
  11. 17. a state of matter characterized by particles which are close together, held in a fairly rigid positions about which they vibrate; a solid has definite volume and shape
  12. 18. two or more elements or compounds that are physically mixed but not chemically combined
  13. 19. subatomic particle found in nucleus having positive charge
  14. 20. the measure of the quantity of matter in an object
  15. 24. how close a measurement is to the actual value
  16. 25. the smallest particle of an element that retains the characteristics of the element
  17. 26. a negatively charged ion
  18. 27. an atom or molecule that is electrically charged because it has a different number of electrons than protons
  19. 28. a subatomic particle in the nucleus of the atom
  20. 29. a fourth state of matter in which matter is partially broken down into electrons and ions
  21. 30. a positively charged ion
  22. 32. atoms of the same element that differ in their mass numbers
  23. 34. model a model for the atom consisting of nucleus and mostly empty space occupied by light electrons
  24. 36. the reproducibility or repeatability of a measurement
  25. 37. a proton or a neutron
  26. 39. a part of a system which is in contact with but physically distinct from other parts of the system