Atoms and Elements Crossword Puzzle

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Across
  1. 2. able to be hammered or rolled into thin sheets
  2. 5. the ability of a substance to transfer heat or electricity
  3. 9. a machine that moves atomic nuclei at high speeds to make heavier elements
  4. 11. a particle in the nucleus of an atom that has no electric charge
  5. 12. the average mass of all the isotopes of an element
  6. 14. a chart of elements arranged by increasing atomic number and similar properties
  7. 19. elements in groups 3-12 of the periodic table; includes metals like iron, copper, and gold with moderate reactivity
  8. 22. element that are typically shiny, malleable, ductile, and good conductors of heat and electricity
  9. 24. the number of protons in the nucleus of an atom; identifies the element
  10. 25. the sum of the protons and neutrons in the nucleus of an atom
Down
  1. 1. a negatively charged particle that moves around the nucleus of an atom
  2. 3. the specific region around the nucleus where electrons are likely to be found
  3. 4. the process in which two atomic nuclei combine to form a larger nucleus, releasing large amounts of energy
  4. 6. the center of an atom that contains protons and neutrons
  5. 7. how easily an element combines with other elements and compounds
  6. 8. atoms of the same element that have different numbers of neutrons
  7. 9. a high-energy state of matter in which atoms lose electrons, creating a mixture of charged particles
  8. 10. the gradual wearing away of a metal due to a chemical reaction, often with oxygen
  9. 13. one or two letters that represent an element
  10. 15. metal elements in group 2 of the periodic table; fairly reactive metals such as magnesium and calcium
  11. 16. able to be pulled into thin wires
  12. 17. the smallest particles of an element that has the properties of that element
  13. 18. a positively charged particle found in the nucleus of an atom
  14. 20. elements in group 1 of the periodic table; very reactive metals such as sodium and potassium
  15. 21. a horizontal row on the periodic table
  16. 23. a vertical column on the periodic table; elements in the same group share similar properties