The Periodic Table and The Elements

123456789101112131415
Across
  1. 1. What family of elements is in the leftmost column of the Periodic Table? (6, 6)
  2. 5. An ________ is a negatively charged subatomic particle.
  3. 7. The majority of the elements in the periodic table are _______.
  4. 9. A vertical column in the periodic table is called a _______.
  5. 11. What is the name of the family of elements that has a full outer shell of electrons? (5, 5)
  6. 13. What is the abbreviation used in the Periodic Table for helium?
  7. 15. What are the horizontal rows of the Periodic Table called?
Down
  1. 2. Elements in the Periodic Table are listed in order of their ________.
  2. 3. Who is the scientist usually credited with inventing the Periodic Table? (6, 10)
  3. 4. These elements, like alkali metals, are very reactive.
  4. 6. The _______ is a subatomic particle which has a mass equal to that of a proton.
  5. 8. An atom or molecule with a negative electric charge due to the loss or gain of one or more electrons.
  6. 10. The atomic number of an atom is the number of ______ in the atom's nucleus.
  7. 12. Which of the following is the abbreviation for the element gold?
  8. 14. What is the capacity of the first electron shell?