EVERYDAY SCIENCE

Detailed explanation-1: -The Group 7A elements have seven valence electrons in their highest-energy orbitals (ns2np5). This is one electron away from having a full octet of eight electrons, so these elements tend to form anions having-1 charges, known as halides: fluoride, F-; chloride, Cl-, bromide, Br-, and iodide, I-.

Detailed explanation-2: -Overview. The elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At) are halogens. Halogens are highly reactive nonmetallic elements in group 17 of the periodic table. They have seven valence electrons, so they are very “eager” to gain one electron to have a full outer energy level.

Detailed explanation-3: -Valence electrons are found in the highest energy s and p orbitals. Bromine has an electron configuration of 1s22s22p63s23p64s23d104p5 with the valence electrons in the 4s and 4p orbitals, giving it 7 valence electrons.

Detailed explanation-4: -Both of them have 7 valence electrons.

Detailed explanation-5: -The atomic number of Bromine is 35. The electronic configuration of Bromine can be written as. The valence electrons are the sum of the electrons in the outermost shell, that is two electrons and five electrons which gives a total of seven valence electrons.