JKSSB Mock Tests

In which year did John Dalton present his atomic theory, the second part of which states that all atoms of a particular element are equal?

A. 1825
B. 1808
C. 1811
D. 1800
Answer: Option B
Solution (By JKSSB Mock Tests Team)
John Dalton first introduced his scientific atomic theory in 1803 and officially published it in his 1808 work, 'A New System of Chemical Philosophy'. This theory was a major historical milestone because it scientifically proposed that all matter is composed of indivisible atoms.
This Question Belongs to: General science Chemistry set 1
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