Chemistry

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Across
  1. 3. substance that cant be broken down into any other substance by chemical reactions
  2. 5. a thing that is composed of two or more elements
  3. 7. the number that tells how many protons are in an element
  4. 11. a bond between two nonmetals
  5. 12. the mass of a chemical element
  6. 13. the vertical columns on the periodic table
  7. 15. part of an atom with a negative charge
Down
  1. 1. part of an element with no charge
  2. 2. showcases all of the chemical elements in order by their atomic number
  3. 4. a bond formed when the valence electrons of one atom permanently transfer to another atom
  4. 6. a row of chemical elements
  5. 8. a noble gas with 10 neutrons
  6. 9. an element with properties of metal and nonmetal
  7. 10. particles that make up everything
  8. 14. part of an atom with a positive charge