Periodic Table

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Across
  1. 2. located in the center of the atom, made of protons and neutrons
  2. 4. Place where electrons of an atom are located
  3. 5. An abbreviation for an element
  4. 6. smallest piece of matter that still has the properties of the element
  5. 7. Horizontal rows of elements that have increasing atomic numbers
  6. 8. This element is found in Group 12 and Period 5
  7. 9. To find this number add the protons and the neutrons
  8. 11. Negatively charged part of atom, not located in the nucleus
  9. 13. Part of the atom that has no charge, located in the nucleus
  10. 15. Horizontal rows of elements with similar characteristics
Down
  1. 1. Russian scientist who created the first Periodic Table
  2. 3. This is equal to the number of protons in an element
  3. 4. each one of these has its own atomic number
  4. 7. Positively charged part of the atom, located int he nucleus
  5. 10. This element has an atomic number of 38
  6. 12. Arranged the Periodic Table based on atomic number and is the one we use today
  7. 14. This element has an atomic mass of 222