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The reactivity of an atom arises from ____?

I know the answer is “b. the existence of unpaired electrons in the valence shell” ,but I need an explanation as to why or how… can anyone help me?

2 Answers

A
Abbie Toy

Feb 20, 2025

When atoms react they do so in order to reach the lowest energy, which is the most stable. The electrons orbitals will overlap in the way that reduces the energy the most. Orbitals of similar energy will produce the greatest stabilisation.The answer you gave isn’t the whole story, it depends what species is reacting with what. The effective nuclear charge on the atom will affect the energy of the valance electrons. So basically, if the species reaction have valance electrons of similar energy they will be able to produce a large decrease in energy/stabilisation, so are more reactive.... Show More
A
Abbie Toy

Feb 20, 2025

the existence of unpaired electrons in the valence shell. .... Show More

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