Chemistry Crossword Puzzle

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Across
  1. 5. The atomic number is the measure of ___ .
  2. 9. A ___covalent bond has an unequal sharing of electrons between the two atoms.
  3. 11. Found in shells orbiting nucleus, with a negative charge.
  4. 13. A chemical ___expresses a chemical composition of a substance.
  5. 15. The smallest unit of an element.
  6. 16. The overall charge of an atom.
  7. 17. A substance that cannot be broken down into simpler substances by ordinary chemical means.
  8. 18. This type of reaction can reverse reactants and products in both directions.
  9. 19. Hydrogen bonds have a _____attractive force.
  10. 21. Atomic ___ is the sum of the number of protons and neutrons.
  11. 23. This type of reaction exchanges components.
  12. 24. Atoms that form a bond due to opposing charges are connected by an ___ bond.
  13. 25. Chemical symbol is Na.
  14. 27. Nonpolar molecules are ___(do not mix well with water).
  15. 29. Found in the nucleus of an atom, with no charge.
  16. 31. The outermost electron shell.
  17. 34. Anything that occupies space.
  18. 35. Radioisotopes can be used in the treatment of ___ .
  19. 36. A ____ formula shows how the atoms are linked together.
Down
  1. 1. Substance formed by atoms from two or more elements(can have ionic or covalent bond).
  2. 2. Substance formed by two or more atoms bonded together by covalent bonds only.
  3. 3. Atom of the same element with a different number of neutrons.
  4. 4. Polar molecules are ___ (mix well with water).
  5. 6. The number allowed in the first shell.
  6. 7. If the valence shell is not full, the atom is considered ___ .
  7. 8. Ion with a negative charge.
  8. 10. This type of reaction breaks down bonds.
  9. 12. This type of reaction forms a new bond.
  10. 14. Found in the nucleus of an atom, with a positive charge.
  11. 20. Ion with a positive charge.
  12. 22. The typical number in a valence shell (octet rule).
  13. 26. Scientific study of matter and the interaction of matter.
  14. 28. Atoms form molecules by sharing electrons are joined with a ___bond.
  15. 30. The chemical ____ is a shorthand for referring to an element or atom of an element.
  16. 32. Nonpolar covalent bonds shared electrons spend ___time revolving between the two atoms.
  17. 33. Atom with a net charge due to the loss or gain of an electron.