The percentage of copper and oxygen in samples of “CuO” obtained by different methods were found to be the same. This illustrates the law of:

According to Daltons's Atomic theory, "The relative number and kinds of atoms are constant in a given compound." postulate describes

According to Daltons's Atomic theory, "Atoms are indivisible particles which can neither be destroyed nor created." postulate describes

Who named indivisible particles as 'parmanu'?

Who named indivisible particles as 'atoms'?

Who laid the foundation of laws of chemical combination?

In a chemical reaction 150 g Baking soda mixture containing sodium bicarbonate and vinegar on heating gives 87 g of carbon dioxide gas. What mass of solid residue will left in food?

4 grams of hydrogen reacts with some oxygen to make 36 grams of water. Figure out how much oxygen must have been used by applying the law of conservation of mass?

_____ are the basic units of matter and the defining structure of elements.

The term "atom" comes from the Greek word for _____, because it was once thought that atoms were the smallest things in the universe and could not be divided.

Atoms are made up of three particles: protons, neutrons and _____.

Atomic radius is measured in

A chemical equation is balanced in accordance with