Create A Crossword (The Periodic Table and its Trends) - Zain Momin

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Across
  1. 1. Elements with atomic numbers 57-71.
  2. 5. Highly reactive metals in group 1 of the periodic table.
  3. 8. A charged atom, either positive or negative, formed by losing or gaining electrons.
  4. 9. Very reactive nonmetals in group 17 of the periodic table.
  5. 11. An element that has properties of both metals and nonmetals.
  6. 12. A measure of an atom's ability to attract and bond with electrons.
  7. 14. The distance from the nucleus to the outermost electron of an atom.
  8. 15. A horizontal row in the periodic table; properties of elements repeat periodically.
  9. 17. Elements that are usually shiny, good conductors of electricity, and malleable.
  10. 18. A vertical column on the periodic table; elements in the same group share similar properties.
  11. 20. The tendency of an element to undergo chemical reactions.
Down
  1. 2. Elements that are typically poor conductors of heat and electricity.
  2. 3. Group 2 metals that are highly reactive but less so than alkali metals.
  3. 4. These electrons are involved in forming bonds with other atoms.
  4. 6. Elements in the middle of the periodic table that have changing oxidation states.
  5. 7. The energy required to remove an electron from an atom.
  6. 10. An element with an atomic number of 19 and a mass of 39.098.
  7. 13. Low reactivity gases in group 18 of the periodic table.
  8. 16. Elements with atomic numbers 89-103.
  9. 19. An element with 6 protons and electrons and an atomic mass of 12.011.