Multiple Choice
Which of the following best describes how the periodic table of elements is organized?
71
views
2. Atoms & Elements
Periodic Table: Classifications
Multiple Choice
How was the work of Newlands similar to that of Mendeleev on the periodic table?
A
Both left gaps for undiscovered elements based on predicted properties.
B
Both classified elements into noble gases and transition metals.
C
Both used atomic number as the basis for arrangement.
D
Both arranged elements in order of increasing atomic mass.
Verified step by step guidance1
Understand the historical context: Both Newlands and Mendeleev worked in the 19th century to organize elements into a periodic system before the discovery of atomic number.
Recognize Newlands' contribution: He proposed the Law of Octaves, arranging elements in order of increasing atomic mass and noticing repeating properties every eighth element.
Recognize Mendeleev's contribution: He arranged elements by increasing atomic mass but also left gaps for undiscovered elements, predicting their properties based on trends.
Compare their approaches: Both scientists arranged elements primarily by increasing atomic mass, which was the best available property at the time for ordering elements.
Note the difference from modern periodic table: Unlike the modern table, neither used atomic number as the basis for arrangement, and noble gases were not classified by Newlands since they were discovered later.
Related Videos
Related Practice
