Periodic Table

Periodic Table

1. Mendeleev

   • first person to order the table as we know it
     • ordered them using atomic mass
   • was able to predict the properties of elements and left gaps

2. differences

   • ordered in atomic numder not mass
   • more elements in modern
     • noble gasses
     • transition metals
     • ancticides and lanthiaides

3. element

   • a substance that consits of only one atom and cant be broken down ant further chemically

4. compound

   • a substance that consits of two or more elements chemically bonded

5. atom

   • simplest particle of an element can survie on its own in the right condition

6. molecule

   • a particule that consists of two or more atoms bonded together

7. groups

   • go down

8. period

   • go across

9. a line will normally divide the metals and non metals

10. groups

    • group 1 (alkali metals)
    • group 2 (alkaline earth metals)
    • group 7 (halogens)
    • group 8 (noble gasses)

11. out of all known elements at room tempature

    • 11 gases
    • 2 liquids
    • the rest are solids