Our atmosphere is a mixture of? The most common liquid on earth is? The characteristic smell of rotten egg spreads throughout the room. This is due to? The movement of molecules from a higher concentration to a lower concentration is known as? Which one of the following state of matter has widely separated molecules? The escape of gas molecules through the hole one after the other without collision is known as? Who believed first that everything was made up of elements? In which century, John Dalton proposed his atomic theory? John Dalton theory brought a great progress in the subject of? Empedocles was a ___ philosopher? Who thought elements the building blocks of all materials? The term element was coined by?