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Chalcocite Definition Chalcocite (Cu2S) is a lead-grey or black mineral, found as a copper ore or in veins. It is a source of copper. It…

Theory of Consumer’s Surplus The concept of consumer’s surplus is one of the most important idea in economic theory especially in demand and welfare economics.…

Thymus Gland Definition Thymus gland is an organ of the lymphatic system located behind the upper sternum (breastbone). T cells (T lymphocytes) develop and mature…

Uses of Arsenic Arsenic is a well-known poison. Arsenic compounds are sometimes used as rat poisons and insecticides but their use is strictly controlled. Surprisingly, arsenic…

Pyrochlore Definition Pyrochlore is a complex oxide mineral (Na,Ca)2Nb2O6(OH,F), which is composed of niobium, sodium, and calcium that forms brown to black, glassy octahedral crystals…

Arsenic is highly toxic in its inorganic form. Contaminated water used for drinking, food preparation and irrigation of food crops poses the greatest threat to…

Nasal Concha Definition Nasal concha also called Turbinate, or Turbinal, any of several thin, scroll-shaped bony elements forming the upper chambers of the nasal cavities.…

Industrial Uses of Mercury Some common uses for mercury are to conduct electricity, measure temperature and pressure, act as a biocide, preservative, and disinfectant, as well…

Hay Fever Definition Hay fever is a seasonal allergy to airborne particles characterized by itchy eyes, runny nose, nasal congestion, sneezing, itchy throat, and excess…

Niobium Definition Niobium is a smooth, silvery, ductile metallic component that, together with the element tantalum, typically occurs in nature. It is used for the…

Chemical properties of Mercury: Mercury (chemical symbol Hg) is an amazing element. It is one of the few metals which is liquid at room temperature.…

Law of Substitution The law of substitution is also known as the law of equi-marginal utility or the law of maximum satisfaction. This law was…