The Development of the Periodic Table Flashcards
Who put the first periodic table together?
The first periodic table was put together by John Newlands.
When was the first periodic table introduced?
The first periodic table was introduced in 1864.
How many elements were known at the time of the periodic table’s creation?
At the time of the periodic tables creation 63 elements were known.
How did John Newlands arrange elements in his periodic table?
John Newlands ordered elements by atomic weight in the first periodic table.
What did John Newlands notice while assembling his periodic table?
John Newlands noticed periodicity (repeated patterns) while assembling his periodic table.
What caused problems in the creation of the first periodic table?
The two main causes of problems were the missing elements and the strict order of atomic weight.
Why was following the order of atomic weight a problem?
Following the order of atomic weight caused some of the elements to be in the wrong place.
Who created our current periodic table?
Our current periodic table was created by Dimitri Mendeleev.
What did Mendeleev realise?
Mendeleev realised that some elements had yet to be discovered.
When did Mendeleev create his periodic table?
Mendeleev created his periodic table in 1869.
What are three ways that Mendeleev improved upon the periodic table?
-He left gaps to allow for elements to be discovered
-He reordered some elements
-He placed each element in a column (group) with elements similar in properties
How did Mendeleev utilise his periodic table?
Mendeleev used his periodic table to predict the existence and properties of new elements.
What did the discovery of subatomic particles reveal about Mendeleev’s periodic table?
The discovery of subatomic particles revealed that Mendeleev’s periodic table was actually organised by increasing atomic number.
