Question
Before the 19th century, who discovered that each chemical element is made from a unique type of atom and those atoms become different according to their atomic mass.
Answer (Detailed Solution Below)
Option a: John Dalton
The correct answer is John Dalton
- According to Dalton's atomic theory each chemical element is made from a unique type of atom and those atoms become different according to their atomic mass.
- Chemical substances combined with each other in consistent units of weight.
- Based on this observation, he proposed that each chemical element is composed of a single, unique type of particle.
Latest RRB NTPC Updates
Last updated on Feb 13, 2024
The RRB NTPC Notification 2024 is expected to be released soon. The RRB NTPC exam is conducted to fill up Non-Technical Popular Category posts. The candidates with successful selection under RRB NTPC get a salary ranging between Rs. 19,900 to Rs. 35,400. here.
Free Books
See AllPremium Books
See All
