Which of the schematics labeled (a, b, c, d) in the image image_3a2500.png correctly represents the structure of Mendeleev's Periodic Table as published in a German journal in 1872?
- Ab
- Ba
- Cc
- Dd
Solution & Step-by-step Explanation
When Mendeleev published his periodic table in the German journal Annalen der Chemie in 1872, it consisted of 8 vertical columns called Groups (designated by Roman numerals I to VIII) and 12 horizontal rows (series) arranged within 6 horizontal Periods.
* Looking at the provided layouts in image_3a2500.png, diagram c shows a grid structured with 8 Groups (I to VIII) and 6 Periods, which perfectly aligns with the historic 1872 configuration.
* Noble gases (Group IX or Group 0) were not discovered at that time, making options like d incorrect. Group VII structures missing Group VIII (like diagram a) are also incorrect.
* Looking at the provided layouts in image_3a2500.png, diagram c shows a grid structured with 8 Groups (I to VIII) and 6 Periods, which perfectly aligns with the historic 1872 configuration.
* Noble gases (Group IX or Group 0) were not discovered at that time, making options like d incorrect. Group VII structures missing Group VIII (like diagram a) are also incorrect.