SPS1 Periodic Table Vocab.

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Across
  1. 4. Atoms of the same element with varying number of neutrons.
  2. 5. This is a column on the periodic table of elements.
  3. 7. This is a substance that cannot be broken down further by chemical means.
  4. 9. The weighted average of all of the isotopes of an element.
  5. 11. A subatomic particle with no charge
  6. 12. Building block of all matter.
  7. 15. These are the reactive elements located in Group 2 of the periodic table.
  8. 18. Area outside the atomic nucleus
  9. 20. These are the highly reactive elements located in Group 1
  10. 21. The central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.
  11. 23. An electron in the highest occupied energy level of an atom
Down
  1. 1. This is a group of elements that have properties intermediate to metals and nonmetals.
  2. 2. This is a very unreactive element in Group 18 with full valence shell.
  3. 3. This is a type of element or substance that is not a metal.
  4. 6. An arrangement of elements into rows and columns according to similarities in their properties.
  5. 8. A subatomic particle with a positive charge
  6. 10. A horizontal row of elements in the periodic table.
  7. 13. This is a group of elements with few valence electrons that conducts heat and electricity.
  8. 14. The number of protons and neutrons in the nucleus of any atom.
  9. 16. A number of an element that is the number of protons in the nucleus of each atom of that element.
  10. 17. These elements have 7 electrons in their outer energy level
  11. 19. A reaction that causes atoms to bond and form new substances.
  12. 22. A subatomic particle with a negative charge