Periodic Table Key Words

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Across
  1. 2. Elements that are typically shiny, malleable, and good conductors of electricity.
  2. 5. Elements that are usually brittle and poor conductors of electricity.
  3. 7. A tabular arrangement of chemical elements, organized by increasing atomic number.
  4. 9. The number of protons in the nucleus of an atom, which determines the element.
  5. 14. Atoms of the same element with different numbers of neutrons.
  6. 15. Elements with properties intermediate between metals and non-metals.
  7. 16. Patterns observed in the periodic table such as changes in atomic radius, ionization energy, and electronegativity.
  8. 17. A horizontal row in the periodic table. Properties of elements change progressively across a period.
  9. 18. The size of an atom, typically measured from the nucleus to the outermost electrons.
Down
  1. 1. How readily an element reacts with other substances.
  2. 3. Elements in Group 0 (or 18), known for their lack of reactivity due to having a full outer electron shell.
  3. 4. Elements in Group 7, highly reactive non-metals.
  4. 6. Elements found in the central block of the periodic table, known for their ability to form various oxidation states.
  5. 8. A pure substance consisting of only one type of atom.
  6. 10. Configuration: The distribution of electrons in an atom's orbitals.
  7. 11. The total number of protons and neutrons in an atom's nucleus.
  8. 12. Elements in Group 1, highly reactive, especially with water.
  9. 13. A vertical column in the periodic table. Elements in the same group have similar chemical properties.