Chemistry Project

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