Tag: chemistry

Silver, copper and iron were used as currency in olden days.

Metals are available as micro-elements in our body. They are needed for conduction of nerve impulses, to carry oxygen by blood, to facilitate enzyme reactions and more. So, metals are used in medicine to cure any metal deficiency diseases in humans and animals. Ex. iron is a part of haemoglobin a biomolecule. Hence, it is used as ferrous sulphate to cure some forms of anaemia.

Metals like titanium, aluminum, magnesium are widely used in medicine for roles like antacids. They are specially studied under the subject of inorganic chemistry.

Gold has the following uses. It does not rusts and supports health. It gives protection from Sun. So, it is used in making jewellary.

Metals used in ornament making are Gold, Silver as they do not rust quickly and for other reasons of Gold, It is used to make jewellary.

Zirconium (Zr) slightly resembles Titanium (Ti) in poison case. it is also used as poison. It is used in making sand paper and ceramics.

Potassium, Nitrogen and Phosphorous are normally derived from the soil in the form of inorganic salts and are nutrients available in fertilizers which make up 0.5 to 6.0 per cent. Hence iron is nutrient which is not available in fertilizers.

Non-metals which are present in fertilizers and enhance the growth of plants are nitrogen and phosphorus. Potassium is a metal. It is also present in fertilizers.

• Over the life of an incandescent light bulb, the filament begins to deteriorate and the particles will settle on the inside of the glass. In return the bulb will take on a grayish appearance and a slight decrease in light output may occur.
  
• For fluorescent bulbs only, the ends will blacken as the bulb is burned. Each time the lamp is turned on and off the emissions material settles on the inside of the glass. Extreme darkening generally indicates the bulb is about to burn out.
  

Hydrogen -- a light and extremely powerful rocket propellant -- has the lowest molecular weight of any known substance and burns with extreme intensity.  In combination with an oxidizer such as liquid oxygen, liquid hydrogen yields the highest specific impulse, or efficiency in relation to the amount of propellant consumed, of any known rocket propellant.