Bromine has 35 electrons, so it will have 35 arrows placed in its orbital-filling diagram as in figure The order bottom to top. Your only mistake is the order. I'd put 4s2 3d10 4p5, since that is the order of energy of these shells. Bromine (Br) has atomic number 35. It has 35 electrons, and has one electron less of that of Krypton. So the configuration of Bromine is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5. As it regains stable. All Br atoms have 35 protons (the atomic number of Br). Since 81 is the mass number (sum of protons + neutrons), this atom has 81-35 = 46 neutrons. An uncharged atom of bromine will have the same.
1 Answer
Explanation:
The atomic number for bromine is 35, which means it has 35 protons in its atomic nuclei. A neutral bromine atom would also have 35 electrons. In order for a bromine atom to become a #1-# bromide ion, it would have to gain an additional electron.
Below is the Lewis dot structure for a neutral bromine atom, which has seven valence electrons.
Below is the Lewis dot structure for a #'Br'^(-)'# ion, which has eight valence electrons. The extra valence electron gives it a negative charge.
Br Electrons Lost Or Gained
Bromine has 35 electrons, so it will have 35 arrows placed in its orbital-filling diagram as in figure The order bottom to top. Your only mistake is the order. I'd put 4s2 3d10 4p5, since that is the order of energy of these shells. Bromine (Br) has atomic number 35. It has 35 electrons, and has one electron less of that of Krypton. So the configuration of Bromine is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5. As it regains stable. All Br atoms have 35 protons (the atomic number of Br). Since 81 is the mass number (sum of protons + neutrons), this atom has 81-35 = 46 neutrons. An uncharged atom of bromine will have the same.
1 Answer
Explanation:
The atomic number for bromine is 35, which means it has 35 protons in its atomic nuclei. A neutral bromine atom would also have 35 electrons. In order for a bromine atom to become a #1-# bromide ion, it would have to gain an additional electron.
Below is the Lewis dot structure for a neutral bromine atom, which has seven valence electrons.
Below is the Lewis dot structure for a #'Br'^(-)'# ion, which has eight valence electrons. The extra valence electron gives it a negative charge.
Br Electrons Lost Or Gained
Br Electrons Number
The diagram below shows how a bromine atom gains an electron from the element lithium in order to form the ionic compound LiBr.
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