Periodic Table

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Across
  1. 3. Group 1. Includes metals that react explosively with water
  2. 4. small positively charged particle in the nucleus of an atom.
  3. 10. Group 2. Reactive, but less than alkali metals.
  4. 13. the number of protons in the nucleus.
  5. 16. an element that is classified based on its physical properties such as hardness, shininess, malleability, and ductility. The metals on the left side of the Periodic Table are very reactive and the metals on the right side of the Periodic Table are not very reactive.
  6. 19. a material that can be pounded into shapes.
  7. 20. have some of the characteristics of metals and some of the characteristics of nonmetals. The most useful property of metalloids is their ability to conduct electricity. On the Periodic Table they are the zigzag which is the border between the metals and nonmetals.
  8. 22. One of the bottom rows. Begins with the element Lanthanum. Includes superheavy metals with high atomic mass
  9. 23. The columns (up and down) on the Periodic Table and are also known as families. Typically, the group is given a family name based on the first element in the column.
Down
  1. 1. created to measure the particles of atoms and is used to determine the number of protons in the nucleus of an atom.
  2. 2. Group 17. Salt forming elements. Names all end with -ine.
  3. 5. metals The elements in groups 3-12; they form a bridge between the reactive metals and the non-reactive metals. The transition metals are so similar that their differences are difficult to detect.
  4. 6. small uncharged particle in the nucleus of an atom.
  5. 7. a substance made of two or more elements, at least one of which is a metal, that has the properties of metal.
  6. 8. Elements that lack most of the properties of metals. Nonmetals tend to be dull, brittle, and are not malleable or ductile. Nonmetals are located to the right of the zigzag line on the Periodic Table.
  7. 9. the electrons in the outermost level of an atom; they are used to form chemical bonds between elements.
  8. 11. One of the bottom rows. Begins with the element Actinium. Includes many artificially synthesized elements.
  9. 12. The elements in group 18; these elements do not ordinarily form compounds with other elements thus they are chemically stable and unreactive.
  10. 14. A tiny negatively charged, high energy particle that moves in the space outside the nucleus of an atom.
  11. 15. Each horizontal row across the Periodic Table.
  12. 17. 1,2, or 3 letter abbreviation used to identify the element. Comes from Greek or Latin and does not always resemble the name of the element (Fe for Iron).
  13. 18. a material that can be pulled out or drawn into a long wire
  14. 21. gloss, brightness, a shine or sheen especially from reflected light.