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∙ 12y agoNeutral Bromine has three complete rings of electrons. The first ring consists of 2 electrons, the second has 8, the third 18, and the fourth has a maximum capacity of 8 electrons. Bromine only has 7 electrons in it's outer ring, though, so it needs one extra electron to complete it's ring.
So to answer your question, it needs ONE more valence electron.
Wiki User
∙ 12y agoBromine has 7 valence electrons. It needs to gain one electron to have a full octet and achieve stability.
Phosphorus has 5 valence electrons. To have 8 valence electrons, it must gain 3 electrons to reach stability.
Atoms with eight valence electrons usually do not gain or lose electrons. Atoms with one, two, or three valence electrons will lose electrons.
Phosphorus, with 5 valence electrons, needs to gain 3 electrons to have a full set of 8 valence electrons. This would allow it to achieve a stable octet configuration, resembling the noble gas configuration of argon.
Aluminum would lose 3 electrons to become like argon. Argon has a full valence shell with 8 electrons, so aluminum, with 3 valence electrons, would need to lose these electrons to achieve a full valence shell configuration similar to argon.
Bromine (Br) has 35 electrons, while Krypton (Kr) has 36 electrons. To have the same electron configuration as Krypton, Bromine would need to lose one electron.
Bromine's atomic number is 35, so it has 7 valence electrons. To achieve 8 valence electrons and a full outer shell, bromine needs to gain one electron.
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Bromine, a halogen, has 7 valence electrons. To achieve a full octet (8 valence electrons), bromine would need to gain one electron to reach stability.
Potassium will lose electrons when reacting with bromine. Potassium is a metal and tends to lose electrons to achieve a stable electron configuration, while bromine is a nonmetal that tends to gain electrons to achieve a stable electron configuration.
Phosphorus wants to gain three electrons to have 8 valence electrons.
Phosphorus has 5 valence electrons. To have 8 valence electrons, it must gain 3 electrons to reach stability.
It loses 2 electrons to obtain the argon configuration of 8 valence electrons.
Boron can lose 3 electrons from its valence shell that is 2 in 2s & 1 in 2p sub-shell, wheras it cannot gain electron b'coz of its electropositive nature & it has less electron affinity.
Sulfur has 6 valence electrons. To achieve 8 valence electrons, sulfur must gain 2 electrons to fill its outer shell and satisfy the octet rule.
It will lose 2 electrons.
Sulfur must gain two electrons.
Compounds will gain or lose electrons in order to reach a more stable state, ideally a full valence shell.