Discoveries
Mendeleev
Elements
Where are they found?
Periodic Table
100
The periodic table
What is a description of how elements differ?
100
Mendeleev
Who is given credit for the modern periodic table?
100
1870
What is by 1870, the 94 naturally occuring elements were known?
100
atomic number
What is the top of the cell?
100
IUPAC
What is the International Union of Pure and Applied Chemistry?
200
Antoine Lavoisier
Who is the chemist who created the first list of 30 elements?
200
Gaps
What are missing or undiscovered elements?
200
Chemical Symbol
What is the most prominenet feature on the periodic table?
200
Periods
What are the rows of the periodic table?
300
Johann Dobereiner
What are triads?
300
1869
What is the year his periodic table was published?
300
Groups or Families
What are the columns?
300
Atomic mass
What is the weighted average?
300
Groups or Families
What are the columns?
400
Periodicity
What are repeatable, measurable properties?
400
Gallium
What is the element discovered that gave validity to Mendeleev?
400
Electron Configuration
What is the number and location of electrons?
400
nonmetals
What is the left side of the periodic table?
500
John Newlands
Are atomic mass and chemical properties related?
500
Periodic Law
What are properties of elements vary with their atomic masses in a periodic way.
500
118
What are the number of known elements?
500
Physical properties
What are symbols and color icons?
500
metalloids
What is elements who share the properties of metals and nonmetals?
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