Question

what happens to chemical reactivity of elements across periods ??? chemistry

Answer 1

first it decreases from 1st period to the 4th period and then it increases with every coming period....

Answer 2

The reaction of an atom with other substances is called its chemical reactivity. It depends on ionization energy (how easily electrons are removed) and electronegativity (how they need other atom’s electrons) as the electrons (valence electrons) interactions are responsible for the chemical reactions.

 

As we go from left to right of the periodic table (across), nuclear charge increases and the additive electrons are added to the same shell, therefore ionization energy increases with increase in electronegativity lead to dynamic exchange of electrons.

 

Metals and non-metals have their own trends across the period.

Metals easily give up electrons to attain stability, hence their reactivity decreases across the period. While, non-metals need to gain electrons to attain stability, hence their reactivity increases across the period.

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