Rosario Distefano Periodic Table

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Across
  1. 4. protons and neutrons are found in a small, positively charged center of the atom.
  2. 5. elements are arranged by increasing atomic number and by change in physical and chemical properties.
  3. 7. the vertical columns in the periodic table.
  4. 8. equal to a number in an atom.
  5. 9. uses the symbol of the element and dots to represent the electrons in the outer energy level.
  6. 13. particles with an electrical charge of 1-.
  7. 15. an atom is the sum of the number of protons and the number of neutrons in the nucleus of an atom.
Down
  1. 1. particles with an electrical charge of 1+.
  2. 2. of an element is the weighted-average mass of the mixture of its isotopes.
  3. 3. atoms of the same element that have different numbers of neutrons.
  4. 6. the area around the nucleus of an atom where its electrons are most likely found.
  5. 10. the smallest piece of matter that still retains the property of the element.
  6. 11. the horizontal rows of elements increased on the periodic table.
  7. 12. protons and neutrons are made up of these smaller particles.
  8. 14. netural particles that do not have a electrical charge.