Periodic Table

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Across
  1. 3. chemical element of the alkali metal group of the periodic table
  2. 4. A one or two letter symbol that represents th
  3. 5. The method by which elements are grouped on the basis of their characteristics
  4. 7. A tabular array of the chemical elements organized by atomic number
  5. 9. a tabular array of the chemical elements organized by atomic number
  6. 10. The basic unit of a chemical element.
  7. 11. A positively charged particle that resides within the atomic nucleus
Down
  1. 1. Located at the center of atoms and carry almost all the fraction of the mass of atoms
  2. 2. A chemical element with symbol H and atomic number 1
  3. 5. Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type
  4. 6. The building blocks of chemistry and matter
  5. 7. a chemical element with symbol Ca and atomic number 20
  6. 8. a chemical element with the symbol C and atomic number 6