Chemistry Project

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Across
  1. 2. What are all things made of?
  2. 7. The subatomic particle of an atom that is negatively charged.
  3. 9. What is the opposite of an insulator?
  4. 11. The subatomic particle of an atom that is positively charged.
  5. 12. What is the other name for the vertical families of the periodic table that determines and groups elements by chemical properties, reactivity, and the number of valence electrons?
Down
  1. 1. The number that comes in front of a chemical formula that you distribute.
  2. 3. Elements in Group 18 have the least __________ because they already have a full valence electron shell.
  3. 4. What is matter made of? (Singular)
  4. 5. When a molecule is made of 2 or more elements, what is it called?
  5. 6. The subatomic particle of an atom that is neutrally charged.
  6. 8. The small, lower "exponent" on an element that signals how many there are of it.
  7. 10. The 7 horizontal rows on the periodic table that group the elements by how many energy levels they have.