The Periodic Table of Elements and Atomic Structure

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123456789101112131415161718
Across
  1. 6. the smallest piece of matter that still retains the property of an element
  2. 7. the number of protons in an atom
  3. 9. a small, positively charged center of the atom where protons and neutrons are found
  4. 11. the elements arranged by the increasing atomic number and changes in physical and chemical properties
  5. 14. an artificially made metal with the chemical symbol Pm
  6. 15. particle with an electrical charge of 1+
  7. 16. the area around the nucleus of an atom where its electrons are most likely found
  8. 17. horizontal row of elements on the periodic table
  9. 18. a gas commonly used in ballons
Down
  1. 1. uses the symbol of the element and dots to represent the electrons in the outer energy level
  2. 2. the weighted mass of the element's mixture of its isotopes
  3. 3. an element with the chemical symbol K that is in the 4th row of the periodic table
  4. 4. smaller particles that make up neutrons and protons
  5. 5. particle with an electrical charge of 1-
  6. 8. a Russian chemist who searched for a way to organize the elements, creating the periodic table
  7. 10. particle that does not have an electrical charge
  8. 12. atom of the same element that has a different number of neutrons
  9. 13. metal with an atomic weight of 65.38