Answer :
An anion is created when a molecule or atom obtains an electron; a cation is created when an electron is lost (a cation). In the creation of an ion, energy can be acquired or lost.
When a bromine atom produces a negatively charged anion or obtains an electron, the species is known as a bromide ion. Protons and electrons are equal in number in a neutral state. Accordingly, bromine possesses 35 electrons before losing one. It possesses 36 electrons overall after gaining one more electron to produce the ion.
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