Q. Which of the following is NOT a postulate of Dalton's atomic theory?
निम्नलिखित में से कौन सा डाल्टन के परमाणु सिद्धांत का प्रतिरूप नहीं है?
Explanation
Dalton's original postulates (early 1800s):
- Atoms are indivisible particles ✓
- All atoms of an element have identical properties ✓
- Atoms of different elements combine in simple whole-number ratios ✓
- Atoms contain protons, neutrons, and electrons ✗
The discovery of subatomic particles (protons, neutrons, electrons) came much later:
Electron: J.J. Thomson (1897)Proton: Ernest Rutherford (1919)
Neutron: James Chadwick (1932)
Invest in Future Achievers
Your support helps keep Exam Achiever 100% free for students preparing for exams.
Thanks for your support!
Comments
Leave a Comment