Name
History
Table
Today
Extra
100
What is helium?
What is He?
100
Who is Dmitri Mendeleev?
Who invented the periodic table?
100
What column is hydrogen in?
What is the first column?
100
How is todays table organized by?
What is increasing atomic number?
100
What are the rows of elements called?
What is periods?
200
What is B?
What is boron?
200
When was the periodic table invented?
When was 1869?
200
What group is helium in?
What is noble gases?
200
When was the periodic table changed?
When is 1914?
200
Why was the periodic table of elements invented?
What is to organize the elements?
300
What is Na?
What is sodium?
300
How was the periodic table organized?
What is atomic weight?
300
What group is sodium in?
What is the alkali metals?
300
How many different elements are there?
What is 118 elements?
300
What atoms are the same on earth and mars?
What is iron atoms?
400
What is Kr?
What is krypton?
400
How is the periodic chart organized?
What is similar chemical properties?
400
What group is gold in?
What is transition metals?
400
What element was discovered first?
What element is copper?
400
When was nickel discovered?
When is 1751?
500
What is Fr?
What is Francium?
500
What does the periodic table help us do?
What is predict new elements?
500
What column is vanadium in?
What is column 5?
500
When was the last element discovered?
When is 2010?
500
What is the name of the last element discovered?
What is Ununseptium?
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