Physical Science - Crossword Chemistry List 1

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Across
  1. 2. Atoms of the same element, but have different masses.
  2. 3. A unique number for each element that equals the number of protons in an atom of that element.
  3. 5. An arrangement of elements in columns based on a set of properties that repeat from row to row.
  4. 8. An ion with a positive charge.
  5. 10. New substances formed as a result of a chemical reaction.
  6. 11. A substance that undergoes change in a chemical reaction.
  7. 14. The possible energies that electrons in an atom can have.
  8. 15. The mass of one mole of a substance.
  9. 17. A law stating mass is neither created nor destroyed during chemical or physical reactions.
  10. 18. The smallest unit of an element that maintains the properties of that element.
  11. 19. An electron that is in the highest occupied energy level of an atom.
Down
  1. 1. The weighted average of the atomic masses of the naturally occurring isotopes of an element.
  2. 4. An ion with a negative charge due to gaining electrons.
  3. 5. A positively charge subatomic particle that is found in the nucleus of an atom.
  4. 6. an atom or group of atoms that has a positive or negative charge due to gaining or losing electrons.
  5. 7. A visual model of the most likely locations for the electrons in an atom.
  6. 9. A neutral subatomic particle that is found in the nucleus of an atom.
  7. 12. A negatively charged subatomic particle found in energy levels around the nucleus of an atom.
  8. 13. 6.02 x 10^23 the number of particles in exactly one mole of a pure substance.
  9. 16. The calculation of quantities of chemical elements or compounds involved in chemical reactions.