Unit 5 Vocabulary Crossword - Science Final - Hunter Taylor

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Across
  1. 3. The dense center of an atom containing protons and neutrons.
  2. 5. A vertical column in the periodic table; elements in a group have similar chemical properties.
  3. 7. A pure substance made of only one type of atom.
  4. 11. A chemical symbol that shows the element and its charge.
  5. 15. The total number of protons and neutrons in an atom’s nucleus.
  6. 17. Elements that are usually dull, brittle, and poor conductors.
  7. 19. A scientist who developed the first modern atomic theory
  8. 20. A group of elements with similar properties, often another name for a group.
  9. 21. A positively charged particle found in the nucleus of an atom.
Down
  1. 1. Discovered the electron using a cathode ray tube
  2. 2. Conducted the gold foil experiment and discovered the atomic nucleus.
  3. 4. A neutral particle found in the nucleus of an atom.
  4. 6. A horizontal row in the periodic table.
  5. 8. A Russian scientist who created the first version of the periodic table.
  6. 9. Elements that are typically shiny, conductive, and malleable.
  7. 10. The smallest unit of an element that still retains the element properties
  8. 12. an atom that has gained or lost electrons, giving it a charge.
  9. 13. reactive nonmetals in group 17
  10. 14. Proposed that electrons orbit the nucleus in fixed energy levels.
  11. 16. model of the atom showing electrons orbiting the nucleus in energy levels.
  12. 18. A negatively charged particle that orbits the nucleus of an atom.