Chemistry 9 Chapter 8 Chemical Reactivity

The tendency of a metal to lose electrons is called as? When the ionization energy of a metal decreases down the group, its electropositivity? When we move from left to right in a period, reactivity of metals with oxygen? When we move along a period, the basic character of oxides? The group IA elements except hydrogen are known as? The group IIA elements are called 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?

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