Question

Amongst the eletrons revolve around the nucleus,which eletrons will 1.determine chemical properties of an element

Answer 1

the electrons that are present in the outermost shell (valence electrons ) determine chemical property of the elements

Answer 2

The valence electrons determines the chemical properties of an element.

Valence electrons is the electrons present in the last shell of an atom.

The valence electrons determines the valency of an element.

Valency is the combining capacity of an element.

Hence , the chemical properties depends on the valence electrons.

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For example :

Consider the element Sodium(Na)

Atomic no: = Z = 11

No: of protons (p) = Z = 11

No: of electrons(e) = p = 11

Electronic configuration = 2 , 8 ,1

Here , the number of valence electrons is 1.

Hence , valency also is 1.

Thus , the combining capacity of the element sodium is 1