So, the metal which is a liquid at standard temperature will be Mercury (Hg). And the non-metal which is liquid at standard temperature is Bromine (Br). Hence, the liquid elements are mercury(Hg) and bromine(Br).

Mercury

Gallium bonds easily with most metals and is commonly used to make low-melting alloys. It is one of four metals (including mercury, rubidium and caesium) that are liquid at or near room temperature.

Mercury and gallium are liquid at room temperature.

bromine

Phosphorous

sodium and potassium can be cut with a knife.

As a pure element, iodine is a lustrous purple-black nonmetal that is solid under standard conditions. It sublimes (changes from a solid to a gaseous state while bypassing a liquid form) easily and gives off a purple vapor. Although it is technically a non-metal, it exhibits some metallic qualities.

Iodine is a non-metallic, dark-gray/purple-black, lustrous, solid element. Iodine is the most electropositive halogen and the least reactive of the halogens even if it can still form compounds with many elements.

Pure iodine is violet, but when it’s dissolved in water, it accepts an electron from the oxygen atom, affecting how it absorbs light. When you shake the fluids, the iodine leaves the water and dissolves in the oil, and returns to its purple colour!

As water is one of the natural sources of iodine, its absence in water can cause several diseases or disorder in human body such as goiter, cretinism, hypothyroidism, decreased fertility rate and mental retardation.

From each area at least 8 drinking water samples were collected and analyzed for iodine and the hardness (calcium and magnesium salt content). Iodine content in the drinking water samples was found in the range from 21 to 119 mg/L and total hardness of drinking water was found to range from 50 to 480 ppm.

Exposure to high iodine concentrations in drinking water has detrimental effects on the intelligence of children.

Iodine is light sensitive and must always be stored in a dark bottle. It works best if the water is over 68 F (21 C). Iodine has been shown to be more effect than chlorine-based treatments in inactivating Giardia cysts.

The taste and odour thresholds for iodine are 0.147–0

Disinfecting water Two percent liquid iodine tincture may be added to water in five-drop increments per one quart of clear water. If the water is cloudy, add ten drops per quart. Iodine tablets may also be used, but the instructions can vary by manufacturer.

Levels of iodine found in drinking water are generally low. Although higher levels of exposure may occur in specific instances when iodine is used as a drinking water disinfectant, extended periods of exposure are considered unlikely, and a guideline value for iodine is not recommended at this time.

The iodine content and mean iodine content of tap water, well or spring water and natural water sources were 4.30±2.43 μg/L (n=34), 23.59±27.74 μg/L (n=19) and 12.72±10.72 μg/L (n=22) respectively.

Dissolve KI in about 20-30 ml of distilled water. Add iodine and heat gently with constant mixing until iodine is dissolved. Dilute to 100 ml with distilled water….BAM R40: Lugol’s Iodine Solution.