History of the Periodic Table (AQA GCSE Chemistry): Flashcards
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Scientist who grouped elements into 'triads' in early 1800s
Scientist who grouped elements into 'triads' in early 1800s
Johann Döbereiner
Term for Döbereiner's groups of similar elements
Term for Döbereiner's groups of similar elements
Triads
Chemist who created first widely recognised Periodic Table
Chemist who created first widely recognised Periodic Table
Dmitri Mendeleev
Year Mendeleev created his Periodic Table
Year Mendeleev created his Periodic Table
1869
How Mendeleev arranged elements in his table
How Mendeleev arranged elements in his table
By increasing atomic mass
What Mendeleev left in his table for undiscovered elements
What Mendeleev left in his table for undiscovered elements
Gaps
What Mendeleev predicted about undiscovered elements
What Mendeleev predicted about undiscovered elements
Their properties
How elements are arranged in the modern Periodic Table
How elements are arranged in the modern Periodic Table
By increasing atomic number
Definition of atomic number
Definition of atomic number
The number of protons
What the modern arrangement by atomic number resolved
What the modern arrangement by atomic number resolved
Inconsistencies that existed with atomic mass ordering
What the Periodic Table helps predict
What the Periodic Table helps predict
Properties of new elements and their compounds