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A chemical bond is an energy relationship between outer electrons and neighboring atoms. The reactivity of an atom is based on the number of electrons in its outer valance. Yes, you can predict whether an atom will become an ion or whether it will bond covalently based on the number of electrons in its outer valence.
What is an atom and electrons?
A chemical element is uniquely defined by its atoms, which are tiny pieces of substance. An atom is made up of a core nucleus and one or more negatively charged electrons that orbit it. The positively charged, comparatively hefty protons and neutrons that make up the nucleus may be present.
A negatively charged subatomic particle known as an electron can either be free or attached to an atom (not bound). One of the three main types of particles within an atom is an electron that is attached to it; the other two are protons and neutrons. The nucleus of an atom is composed of electrons, protons, and neutrons together.
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