Review - Periodic Table and Atoms

Edit Answers
12345678910111213
Across
  1. 2. The largest element category of the periodic table.
  2. 6. The atomic _____ is a decimal value on an element tile because it is an average value for all atom variations of an element.
  3. 7. The outer most shell electrons are known as _________ electrons. When full, an atom is most stable.
  4. 10. The element category that is considered to be poor conductors of heat and electricity.
  5. 11. Atoms with the SAME number of protons but different number of neutrons (i.e., different versions of the same element).
  6. 12. The rows of the periodic table.
Down
  1. 1. The groups of the periodic table are also known as ________.
  2. 3. The _____________ created by the metalloids divides the two other element categories (metals and non-metals).
  3. 4. made two or more atoms bonded to each other by a chemical reaction.
  4. 5. The periodic table organizes elements according to their physical and chemical ___________________.
  5. 6. ________'s work led to the modern periodic table and he was able to accurately predict undiscovered element properties.
  6. 8. A molecule made of two or more elements which gives it different properties from the individual elements.
  7. 9. For metals, are you more right to left and top to bottom their ______ increases.
  8. 13. The name given to an atom when it gains or loses electrons.