chp. 12 vocab.

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Across
  1. 4. the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
  2. 5. in chemistry, a horizontal row of elements in the periodic table
  3. 6. one of the elements of group 1 of the periodic table(lithium, sodium, potassium, rubidium, cesium, and francium)
  4. 7. one of the elements of group 17 of the periodic table(fluorine, chlorine, bromine, iodine, and astatine)halogens combine with most metals to form salts
Down
  1. 1. one of the elements of group 2 of the periodic table(beryllium, magnesium, calcium, strontium, barium, and, radium)
  2. 2. one of the elements of group 18 of the periodic table(helium, neon, argon, krypton, xenon, and radon); noble gases are unreactive
  3. 3. a vertical column of elements in the periodic table; elements in a group share chemical properties
  4. 4. describes something that occurs or repeats at regular intervals