Elements Quiz 1

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Across
  1. 2. One of two elements discovered by Marie Curie
  2. 5. Heaviest known synthetic element, previously named Ununoctium
  3. 6. Heaviest Naturally Occurring Element
Down
  1. 1. Name given to group of elements that includes Fluorine, Chlorine, and Bromine
  2. 3. Lightest element
  3. 4. One of two elements discovered by Marie Curie