Question

The reactivity of an atom arises from
A) the existence of unpaired electrons in the valence shell
B) the energy differences between the electron shells
C) the sum of the potential energies of all the electron shells
D) the 2 distance of the outermost electron shell from the nucleus

Answer 1

Heyaa☺
________________________

➡The reactivity of an atom arises from the existances of unpaired electrons in valance shell.

⚫Option is (A)

_______________________

Hope you understand...✌
#BeBrainly❤

Answer 2

Answer:

A) the existence of unpaired electrons in the valence shell

The reactivity of an atom arises from the existence of unpaired electrons in the valence shell.

Explanation:

The presence of unpaired electrons in the valence shell is what causes an atom to be reactive. Unpaired electrons in the valence shells are what cause an atom to be reactive. The atom becomes inactive once the valence shells are finished. They are chemically reactive when they are, nevertheless, imperfect. Therefore, the presence of unpaired electrons in the valence shells is the correct answer, which is (A).

• The presence of unpaired electrons in the valence shell is what causes an atom to be reactive.
• An atom's reactivity is based on the number of electrons in its outermost shell. Atoms can be highly reactive or extremely inactive depending on how many valence electrons they have.
• The quantity of valence electrons in an atom also affects whether or not it is more likely to lose or gain electrons during chemical processes. Metals may conduct electricity because they readily give away electrons.