Periodic Table Crossword

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Across
  1. 2. elements that are usually dull in appearance, poor conductors of heat and electricity, gases at room temperature
  2. 5. metallic elements in group 2 of the periodic table which are harder than the alkali metals and are also less reactive
  3. 6. A negatively charged ion
  4. 7. A horizontal row of elements in the periodic table
  5. 10. A regular periodic variation of properties of elements with atomic number and position in the Periodic Table.
  6. 11. An elment that is solid at room temperature, a good conductor of heat and electricity, and generallyis shiny, most metals are ductile and mallerable
  7. 13. Elements of group 7A. Have a charge of -1. Fluorine, Chlorine, Bromine, Iodine. Form compounds with sodium in the form NaX
  8. 15. The average mass of all the isotopes of an element.
  9. 18. An atom or group of atoms that has gained or lost one or more electrons, thus acquiring a charge.
  10. 19. Elements of group 1A. Have a charge of +1. Lithium, Sodium, Potassium, Rubidium, Cesium. React with water to form hydrogen gas and a metal hydroxide (MOH) + H2. Also from compounds with the halogens in the form MX. Ex. NaCl.
Down
  1. 1. 14 elements with atomic number 58-71 (shiny metals similar in reactivity to to alkaline earth metals)
  2. 3. A positively charged ion
  3. 4. Groups 3-12, 1-2 electrons in the outer energy level, less reactive than alkali-earth metals, shiny, good conductor of thermal energy and electrical current, high density
  4. 7. the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
  5. 8. A Russian chemist. He is credited as being the primary creator of the first version of the periodic table of elements.
  6. 9. Arranged elements in order of increasing ATOMIC NUMBER
  7. 12. A column on the periodic table
  8. 14. Number of protons in the nucleus of an atom
  9. 16. A series of elements that follow actinium in Period 7 of the periodic table and that are typically placed separately at the bottom of the periodic table
  10. 17. Elements in group 8A of the periodic table. Have no charge and are gases under normal conditions