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Chemistry CBSE Live product
Class 9 (2026-27)
Journey Inside the Atom
PT1 Revision I - Journey inside the atom
1.
A&R - Development of atomic theory
Question:
1
m.
Give
the
best option
answer:
Assertion (A)
The discovery of subatomic particles helped scientists understand the structure of the atom.
Reason (R)
In a neutral atom, the number of electrons is equal to the number of protons.
Both A and R are true, and R is the correct explanation of A
Both A and R are true, but R is not the correct explanation of A
A is true, but R is false
A is false, but R is true
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