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.
Silicon (Si) can gain or lose 4 electrons. It can either gain 4 electrons to have a stable octet configuration or lose 4 electrons to achieve a stable configuration.
Lithium atom: Gain 1 electron Bromine atom: Lose 1 electron Barium ion: Lose 2 electrons Helium atom: No electrons need to be gained or lost
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
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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.
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.
Se will gain electrons
Bromine typically gains one electron when forming an ion to achieve a stable electron configuration. The electron configuration for a bromine ion is [Kr] 4d10 5s2 5p6, which is the same as that of a noble gas.
Silicon (Si) can gain or lose 4 electrons. It can either gain 4 electrons to have a stable octet configuration or lose 4 electrons to achieve a stable configuration.
Lithium atom: Gain 1 electron Bromine atom: Lose 1 electron Barium ion: Lose 2 electrons Helium atom: No electrons need to be gained or lost
it will lose 3 electrons
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
Neutral 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.
Bromine is most likely to gain one electron when forming an ion, as it is in Group 17 of the periodic table (halogens) with 7 valence electrons. By gaining one electron, bromine achieves a stable octet and forms a Br- ion.
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