Physical Science Study Guide

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Across
  1. 3. Metals in group 1, very reactive
  2. 4. Caused when the production of particles changes the amount of protons
  3. 5. Metals in group 2, less reactive than alkaline metals
  4. 8. Rare earth elements, follow the element lanthanum, located in top row of the section of the periodic table outside of the main body
  5. 10. Area around atom’s nucleus where electrons are most likely to be found
  6. 15. Elements in group 17, name means “forming salts” in Greek, very reactive nonmetals
  7. 16. Number of protons in an atom
  8. 17. Form of an atom w/ a different number of electrons
  9. 19. Elements in groups 3-12, generally less reactive than most other metals, properties vary based on the element
  10. 22. Ion w/ more electrons than protons
  11. 23. Elements 89-103, radioactive, not naturally occurring
  12. 24. Row of the periodic table organized by the atomic number
Down
  1. 1. Opposite properties of metals
  2. 2. Characteristic of a certain isotope, time taken to decay depends on half-life
  3. 6. Element w/ shiny appearance that conducts heat and electricity well
  4. 7. Center of an atom, has protons and neutrons
  5. 9. Particles w/ no charge
  6. 11. Ion w/ more protons than electrons
  7. 12. Column of the periodic table organized by similar properties
  8. 13. Have properties of metals and nonmetals, often make up semiconductors (materials that conduct electricity under some conditions)
  9. 14. Positively charged particles
  10. 18. Negatively charged particles
  11. 20. Form of an atom w/ a different number of neutrons
  12. 21. (Inert) Gases: Elements in group 18, almost never react w/ other elements