Science key words crossword puzzle

12345678910
Across
  1. 1. also referred to as reaction yield
  2. 3. is a way of presenting information of atoms
  3. 6. electrically neutral group of two or more atoms held together by chemical bonds.
  4. 8. a pure substance consisting only of atoms that all have the same numbers of protons in their nuclei.
  5. 9. species formed from chemical reactions.
  6. 10. is the smallest unit of ordinary matter that forms a chemical element.
Down
  1. 2. evidence that serves to either support or counter a scientific theory or hypothesis
  2. 4. a process that leads to the chemical transformation of one set of chemical substances to another.
  3. 5. is a form of matter having a constant chemical composer
  4. 7. usually a letter or number, that's printed slightly below and to the side of another character.