math

12345678910111213141516171819202122232425262728
Across
  1. 3. Negatively charged ion
  2. 4. Vertical column of periodic table
  3. 9. Resulting substances in a chemical reaction
  4. 11. Ability of a substance to be beaten into thin sheets
  5. 14. Logical approach to solving problems
  6. 15. Three-dimensional region around the nucleus
  7. 17. Polyatomic ions that have oxygen
  8. 20. AB → A + B
  9. 22. Positively charged particle
  10. 23. Smallest unit of an element
  11. 24. Mass of a water molecule
  12. 25. Neutral atoms held by covalent bonds
  13. 26. Original substances in a chemical reaction
  14. 27. Compound that has an anion and cation from an acid
  15. 28. Substance that's not entirely used up in a reaction
Down
  1. 1. Number of protons of an element
  2. 2. Positively charged ion
  3. 5. A + B → AB
  4. 6. Process that leads to the formation of ions
  5. 7. Horizontal row of periodic table
  6. 8. Ability of substance to be stretched into wires
  7. 9. Charged group of covalently bonded atoms
  8. 10. Has mass and takes up space
  9. 12. Identification of the structure of materials
  10. 13. Compounds containing two elements
  11. 16. Lowest state of atom
  12. 18. Research made for additional knowledge
  13. 19. Atom(s) that have a positive or negative charge
  14. 21. Study of matter and its changes
  15. 22. Repeating patterns