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The proton was characterised in the year:
A1939
B1919
C1929
D1909
Answer & Solution
Correct answer: B. 1919
1. The positively charged particle was identified before the neutron.
2. It was characterised in 1919.
3. So the correct answer is 1919.
_Source: syllabus Chemistry, Ch 2 'Structure of Atom'_
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