Chemistry Crossword Puzzle

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Across
  1. 3. a system of measurement that uses the meter, liter, and gram as base units of length , capacity, and weight respectively.
  2. 5. the identity and relative number of the chemical elements that make up any particular compound.
  3. 6. a group of two or more atoms that form the smallest identifiable unit
  4. 10. What element has a symbol of O
  5. 12. Composed of two or more parts, elements, or ingredients
  6. 13. What element has a symbol of N
  7. 15. defined as the measurement system used in many countries including the United States using feet, pounds and seconds.
  8. 17. What element has a symbol of C
  9. 18. the smallest unit of ordinary matter that forms a chemical element.
  10. 19. formula for a compound existing as discrete molecules that gives the total number of atoms of each element in a molecule
Down
  1. 1. most noted for his contribution to molecular theory now known as _______'s law
  2. 2. What compound has a chemical formula of CO2
  3. 4. the quantity of three-dimensional space occupied by a liquid, solid, or gas.
  4. 7. the formula that shows the ratio of elements present in the compound, but not the actual numbers of atoms found.
  5. 8. the average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally-occurring element
  6. 9. standard unit (6.02214076 x 10^23) in chemistry for measuring large quantities of very small entities such as atoms.
  7. 11. A substance that cannot be broken down into simpler substances by chemical means.
  8. 14. What compound has a chemical formula of H2O
  9. 16. What element has a symbol of H