Question

How can we predict which elements are reactive under normal conditions and which are unreactive?​

Answer 1

Answer:

We can predict or comment about reactivity of elements by taking into consideration their electronic configuration that imparts stability or un-stability to an atom.

Explanation:

Reactivity : It refers to the affinity of a substance to combine with other substance .

Elements are mainly of two types :

• Metals and Non metals

In terms of metals or non metals it can be defined as tendency to loose or gain electrons .

• On the basis of it ,we can easily make out or comment about the reactivity of element (metal or non metal ) .Like ,if an element has completely filled outermost shell or we can say have stable electronic configuration then it is already stable .Therefore , it won't react with any other element .
• But, if its outer shell isn't complete then in order to attain stability it will combine or react with other .Hence , we can say it will be quite reactive .