Periodic Table /history Flashcards
How does the number group you affect the element
Your group number Determines how many electrons are on your outershell
How does what period number your element is on the periodic table affect element?
Your period number is equal to the number of shells Your element has
How did John Dalton in 1864 elements in the periodic table
Elements were arranged in the order of there atomic weights
What was John Newland Law called in 1864 and what did it State
John Newlands law of octaves state that if chemical elements are arranged according to increasing atomic weights elements with similar physical and chemical properties occur each 7 intervals
Why was John newland law of octaves not Used for long
Because the table was not completed and it made elements end up in inappropriate groups
How did Dimitri Mendeleev in 1864 do to period tables
He left gaps in the table elements that He thought had not been discovered and in some places changed the order placed on atomic weight and could roughly guess undiscovered elements atomic weight and mass number from the elements above and below the undiscovered elements space
How has Dimitri Mendeleev revolutionised the periodic table
Later in the 20th century Dimitris guessing of elements worked
