Latin Derivatives: Manganese—Radium

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Across
  1. 5. Element - Radium
  2. 6. Losing first particle turns it into actinium
  3. 7. Named after planet Neptune
  4. 9. daughter of Tantalus
  5. 11. Lead
Down
  1. 1. Forms green salts
  2. 2. Named after planet Pluto
  3. 3. Neodymium was “new twin” of lanthanum
  4. 4. Soda, saltpeper
  5. 8. Named for asteroid and was called Pallas year prior
  6. 9. Named because it was a new element
  7. 10. Once believed to be part of all known acids