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 (symbol Br and atomic number 35) and mercury (symbol Hg and atomic number 80) are both liquids at room temperature. Bromine is a reddish-brown liquid, with a melting point of 265.9 K. Mercury is a toxic shiny silvery metal, with a melting point of 234.32 K. Elements That Become Liquid 25Â°C-40Â°C When the temperature is slightly warmer, there are a few other elements found as liquids at normal pressure: 1  Francium. 2  Cesium. 3  Gallium. 4  Rubidium.