Unit 1: Atoms & The Periodic Table of Elements

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Across
  1. 2. Family of elements that are neither metals, nor metalloids
  2. 4. How an element reacts with atoms of other elements when mixed
  3. 5. The one or two letters used to identify an element on the periodic table
  4. 8. Determined by subtracting the atomic number from the atomic mass of an element
  5. 9. This is the electric charge of electrons
  6. 10. The most highly reactive group of elements on the periodic table
  7. 11. Group of elements that form salts when chemically combined with other elements
  8. 12. The negatively charged particles found orbiting around the nucleus of an atom
  9. 13. This is the electric charge of protons
  10. 15. The subatomic particles with no electric charge found within an atom's nucleus
  11. 17. The second most reactive group of elements on the periodic table
  12. 19. The outermost layer of electrons of an atom (determine chemical properties of an atom)
  13. 21. This is the electric charge of neutrons
  14. 24. The rows of the periodic table, labeled 1-7 from top to bottom
  15. 26. The positively charged particles found within an atom's nucleus
  16. 27. Family of elements that are mostly radioactive and are lumped together in group 3, period 7
  17. 29. Family of elements that are mostly radioactive and are lumped together in group 3, period 6
  18. 30. A chart that organizes elements based on their physical and chemical properties
  19. 31. The physical appearance, hardness, luster, mass, density, and color of an element
Down
  1. 1. The family of metals that do not follow the same rules for valence electrons as groups 1, 2 and 13-18.
  2. 3. Family of elements that are mostly radioactive and comprised of the lanthanide and actinide series.
  3. 6. Protons, Neutrons, and Electrons
  4. 7. The only group of elements that are chemically inert and do not react under natural conditions
  5. 14. The area where electrons are most likely to be found
  6. 16. The number of protons within the nucleus of an atom (also the number of electrons in a stable isotope of an element)
  7. 18. A pure substance that can be classified by a single atom and its physical and chemical properties
  8. 20. The combined total of all protons, neutrons, and electrons of a single atom of a single element
  9. 22. The smallest unit of matter with all properties of a specific elements
  10. 23. The columns of the periodic table, labeled 1-18 from left to right
  11. 25. The family of elements that are not true metals but share some similar properties like metals
  12. 28. The center of atom's structure where most of its mass is located