THE PERIODIC TABLE AND ITS TRENDS

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Across
  1. 3. measure of the tendency of an atom to attract an bonding pair of electrons.
  2. 4. Electrons-The electrons in the outermost shell of an atom that determine its chemical properties.
  3. 5. that are usually gases or brittle solid and are poor conductors.
  4. 6. Affinity-The energy change that occurs when an electron is added to a neutral atom.
  5. 9. Gases-Non-Reactives elements in group 18,known for their stable electron configurations.
  6. 10. Number-The number of protons in the nucleus of an atom,defining the element.
  7. 12. row in the periodic table representing the energy levels of electrons.
  8. 13. Energy- The energy required to remove an electron from an atom or ion.
  9. 14. Metals-Highly reactive metals in group 1 of the periodic table.
  10. 15. Number-The total number of protons and neutrons in an atomic nucleus.
Down
  1. 1. that are typically solid,conductive,and malleable.
  2. 2. column in the periodic table that contains elements with sim liar chemical properties.
  3. 7. pure substance that Cannot be broken down into simpler sub substances.
  4. 8. Metals-Element found in group 3-12 known for their ability to form various oxidation states.
  5. 11. with properties of both metals and nonmetals,found a long the Zig-Zag line on the periodic table.