Sci: History of Periodic Table Flashcards
1
Q
Father of Modern Chemistry
first to recognize the true elements
A
Antoine Laurent Lavoisier (1743-1749)
2
Q
Who invented the Law of triads?
A
Johann Dobereiner (1817)
3
Q
What is the Law of Triads?
A
groups of 3 elements with similar properties and proportional atomic mass
4
Q
Started using Chemical symbols (O and H2O)
A
Jons Jacob Berzelius (1828)
5
Q
Who discovered the Law of Octaves?
A
John Newlands (1864)
6
Q
What is the Law of Octaves?
A
Elements are arranged by atomic mass
Every 8th had similar p
7
Q
Organized elements by mass
Early periodic tables
A
Lothar Meyer (1869)
8
Q
Grouped 66 elements by properties and atomic mass (early periodic tables)
predicted existence of unknown element
A
Dmitri Mendeleev (1869)
9
Q
Modern Periodic Table (order of atomic number)
A
Henry Moseley (1913)
