Practice Questions for Atoms and Molecules Science Class 9
The molecular formula of potassium nitrate is __________.
The smallest particle of a substance that is capable of independent existence is the ________.
12g of oxygen gas is same as
The number of gram atoms are present in 69 grams of sodium is
The atomic number of an element X is 13.The number of electrons in its ion X3+ will be
Atoms of which isotopes are used as a standard to compare the masses of different atoms of elements
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