Vitamin B12 deficiency can cause weakened bones and may lead to hip fractures. Severe vitamin B12 deficiency can cause neurological problems, such as confusion, dementia, depression, and memory loss. Other symptoms of vitamin B12 deficiency involve the digestive tract.
â¦The answer is Bromine because the question clearly states, at room temperature this halogen is a liquid, and on any periodic table, bromine is a different colour to the other elements showing that it is a liquid or it melts close to room temperature.
1 At room temperature, elemental bromine is a reddish-brown liquid. 2  The only other element that is a liquid at room temperature is mercury. 3  Bromine is used in many fire retardant compounds. The only other element that is a liquid at room temperature is mercury. 2  Bromine is used in many fire retardant compounds. 3  Bromide compounds used to be used as sedatives. 4  The ancient royal purple dye called Tyrian Purple is a bromine compound. 5  Bromine was used in leaded fuels to help prevent engine knock.