Practice Questions for Atoms and Molecules Science Class 9
Indivisibility of an atom was proposed by _________.
Atomic mass of calcium is 40. The mass of 2.5 gram atoms of calcium is __________.
5 grams of Calcium is same as (Atomic mass of Calcium is 40)
An example of a triatomic molecule is _________.
Among the following examples, a polyatomic ion is
All samples of carbon dioxide contain carbon and oxygen in the mass ratio of 3 : 8. This is in agreement with the law of ____________.
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