chem study guide part 2: chapter 2

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Across
  1. 3. represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine
  2. 6. any of the six elements of Group 1 of the periodic table
  3. 9. Elements and compounds can exist as solids, liquids, or gases called a _______
  4. 11. encompasses the 14 metallic chemical elements with atomic numbers from 89 to 102
  5. 12. used to describe a substance which dissolves and forms a clear mixture with water
  6. 13. any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.
  7. 15. A substance with high electrical conductivity, luster, and malleability, which readily loses electrons to form positive ions (cations)
  8. 17. any of the six chemical elements that comprise Group 2 of the periodic table
  9. 18. a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols and numbers
  10. 21. naturally occurring members of group 18 of the periodic table
  11. 22. the building materials of all matter
  12. 23. the weighted average mass of the atoms in a naturally occurring sample of the element
  13. 24. the short columns in the center of the periodic table, between Group 2A and Group 3A
Down
  1. 1. element that mostly lacks metallic properties
  2. 2. states that mass cannot be gained or lost in a chemical reaction
  3. 4. a group in the periodic table consisting of six chemically related elements: fluorine, chlorine, bromine, iodine (I), astatine,
  4. 5. atomic mass is measured using _____________
  5. 6. the whole number in each elements square on the periodic table
  6. 7. The table Mendeleyev created, with elements organized into rows and columns
  7. 8. represent an element using letters on a periodic table
  8. 9. The horizontal rows of the periodic table
  9. 10. type of chemical element which has a preponderance of properties in between, ormixture of, those of metals and nonmetals
  10. 14. evidence of new substances forming during an experiment
  11. 16. numbered 1–18 from left to right
  12. 18. chemical substance composed of many identical molecules containing atoms from more than one chemical element held together by chemical bonds
  13. 19. property that describes how easily an element will combine with other substances to form new compounds
  14. 20. The mass of an atom