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CBSE
Class 9
Science
Exploration
Journey Inside the Atom
Question Bank

What does it indicate if an at...

Single Answer MCQ
Q-00172099

What does it indicate if an atomic number changes for an element?

1

It transforms into a different element

2

It becomes an ion

3

It gains or loses mass

4

It loses or gains neutrons

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Which scientist's atomic theory was based on experimental observations?

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