CHEMISTRY- 9.2 The Development of the Periodic
Table- STUDY GUIDE WITH 100% CORRECT
SOLUTIONS
Elements - ✔✔Substances that cannot be broken down chemically.
Triads - ✔✔Groups of three elements with similar properties.
Johann Döbereiner - ✔✔German chemist who proposed triads.
Octaves - ✔✔Arrangement of elements where every eighth element is similar.
John Newlands - ✔✔Chemist who organized elements into octaves.
Dmitri Mendeleev - ✔✔Russian chemist credited with the periodic table.
Periodic Law - ✔✔Properties recur periodically when elements are ordered by
mass.
Atomic Mass - ✔✔Mass of an element's atoms, used in early periodic tables.
Table- STUDY GUIDE WITH 100% CORRECT
SOLUTIONS
Elements - ✔✔Substances that cannot be broken down chemically.
Triads - ✔✔Groups of three elements with similar properties.
Johann Döbereiner - ✔✔German chemist who proposed triads.
Octaves - ✔✔Arrangement of elements where every eighth element is similar.
John Newlands - ✔✔Chemist who organized elements into octaves.
Dmitri Mendeleev - ✔✔Russian chemist credited with the periodic table.
Periodic Law - ✔✔Properties recur periodically when elements are ordered by
mass.
Atomic Mass - ✔✔Mass of an element's atoms, used in early periodic tables.
