Normal, functioning kidneys. 1  prevent the buildup of wastes and extra fluid in the body. 2  keep levels of electrolytes, such as potassium and phosphate, stable. 3  make hormones that help regulate blood pressure. 4  make red blood cells. 5  keep bones strong.
They lack only one electron to form a complete shell or subshell, and are extremely active chemically. Chemical activity increases as you move upward in the group, fluorine being the most active element in the Periodic Table. At room temperature, fluorine and chlorine are gases, bromine is liquid, and iodine is solid.They form diatomic molecules in the pure state. The halogens are poisonous, and chlorine gas and chlorine compounds have been used as chemical weapons.hey lack only one electron to form a complete shell or subshell, and are extremely active chemically. Chemical activity increases as you move upward in the group, fluorine being the most active element in the Periodic Table. At room temperature, fluorine and chlorine are gases, bromine is liquid, and iodine is solid.
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 configuration of Krypton by just capturing one electron, its valancy is 1. and thus is very electronagative and very reactive. it can form cobalant bond with another atom of bromine to form molecular bromine (Br2) liquid.