Phys. Science Module 16

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Across
  1. 1. area of an atom where its electrons are most likely found
  2. 2. the average mass of the mixture of isotopes of an element
  3. 4. smallest piece of matter that has the properties of the element
  4. 10. particle with no charge (neutral)
  5. 12. a number equal to the number of protons in an atom’s nucleu
  6. 13. an arrangement of the elements by increasing atomic number and by changes in physical and chemical properties
  7. 15. smaller particle that makes up protons and neutrons
  8. 16. a vertical column of elements on the periodic table
  9. 17. amount of matter in an object
Down
  1. 1. the symbol of an element with dots representing the number of electrons in the outer energy level
  2. 3. particle with an electrical charge of 1+
  3. 5. sum of the number of protons and neutrons in an atom
  4. 6. substance with atoms that are all alike
  5. 7. atoms of the same element with different numbers of neutrons
  6. 8. a horizontal row of elements on the periodic table
  7. 9. any characteristic of a substance that indicates whether it can undergo a certain chemical change
  8. 11. particle with an electrical charge of 1-
  9. 14. small, positively charged center of an atom