Unit 1 Vocabulary

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Across
  1. 2. A table in which all the known elements are arranged by properties and are represented by one or two letters, referred to as chemical symbols
  2. 6. The numerical relationships found in balanced chemical equations that relate the relative quantities of the substances taking part in a
  3. 7. The radius of an atom's ion, which tends to increase when an electron is gained and decrease when an electron is lost
  4. 11. A form of chemical bond that is characterized by the electrostatic attraction that binds oppositely charged ions together
  5. 14. One of the primary substances that make up matter and cannot be chemically broken down or converted into other substances; defined by the
  6. 17. symbol; shows the number of a specific
  7. 18. The starting substance(s), written on the left side of the chemical reaction arrow, which will be destroyed during a chemical change
  8. 21. The tiny, very dense, positively charged region in the center of an atom made up of protons and neutrons
  9. 22. reaction
  10. 23. fields or other charged particles
  11. 24. columns on a periodic table
  12. 27. A number written below and to the right of a
  13. 28. Elements that are typically solid, shiny, malleable, and good conductors of heat and electricity
  14. 29. the mass, in grams(g), of one mole of a substance
  15. 30. number
  16. 31. A negatively charged subatomic particle of the electron cloud; involved in the formation of chemical bonds
  17. 32. The ending substance(s), written on the right side of the chemical reaction arrow, that are created during a chemical change
  18. 33. A positively charged subatomic particle of the nucleus of an atom that contributes to the mass of the atom
  19. 36. Discrete regions around the nucleus where electrons can exist
  20. 39. A form of chemical bond that is characterized by the sharing of pairs of electrons between atoms
  21. 40. The force of attraction holding metal atoms together; the attraction occurs between positively charged ions and free-floating, nonlocalized
  22. 41. May be positive, negative, or neutral; can be present on subatomic particles, atoms, or molecules; causes the object to interact with
  23. 43. The weighted average mass of an element based on the abundances of the naturally occurring isotopes of that element
  24. 44. The process by which one or more substances change to produce one or more different substances
  25. 45. rows on a periodic table
Down
  1. 1. The tendency of an atom or group of atoms to attract electrons
  2. 3. A subatomic particle of the nucleus of an atom that is without charge and contributes to the mass of an atom
  3. 4. The smallest unit of an element that has all of the properties of that element; contains a nucleus within a surrounding electron cloud
  4. 5. Elements that have properties of both metals and nonmetals; sometimes referred to as semiconductors
  5. 8. A number representing the number of molecules in an equation; placed in front of a chemical symbol or formula to balance the equation according to conservation of mass
  6. 9. equal to 6.02 x 10^23 particles of a substance
  7. 10. The principle stating that matter can be changed from one form to another but it cannot be created or destroyed
  8. 12. A representation of a chemical reaction using numbers and symbols of the elements to represent atoms and molecules
  9. 13. Any of the elements found in Group 18 of the periodic table
  10. 15. of atom present
  11. 16. The process of converting an atom or molecule into an ion by adding or removing electrons
  12. 19. The number of protons found in the nucleus of an element
  13. 20. A mathematical analysis using ratios to convert from one measurement to another
  14. 25. electrons
  15. 26. Expressed as 6.02 x 10^23; the number of representative particles contained in one mole of a substance
  16. 34. Elements that are typically not shiny, are usually gases or brittle solids, are not malleable, and are poor conductors of heat and electricity
  17. 35. All of the area inside an atom surrounding the nucleus where electrons are found
  18. 37. The electrons in the outermost energy level of an atom that influence how an element will react with other substances
  19. 38. The distance from the nucleus of an atom to the outermost electron orbital
  20. 42. The ratio between the numbers of moles of any two substances involved in a chemical reaction