natural numbers

Although organic compounds are basically made up of carbon, hydrogen, oxygen and a few more elements, their number is far greater than the inorganic compounds which don't form bond..

. This group of pesticides can kill all insects / animals including all beneficial predators / parasites of pests. The use of ecofriendly pesticides has not offered solutions to many pests (e.g., coconut mites). Where is the solution for pernicious problems? In many countries (including India) the ..

Metals are the elements which form positive ions by losing electrons, while non-metals always gain electrons. All metals (except hydrogen) form positive ions by loosing electrons. Metals have 1 to 3 electrons in the outermost shell of their atom and non-metals have 4 to 8 electrons in the out..

A large number of elements occur inside or around the earth. Less reactive elements, like platinum, gold, nitrogen, oxygen etc., occur in free (native) state. Chemically active elements always occur in the combined state i.e. in the form of compounds containing that element. For ins..

Metals are the elements which form positive ions by losing electrons, while non-metals always gain electrons. All metals (except hydrogen) form positive ions by loosing electrons. Metals have 1 to 3 electrons in the outermost shell of their atom and non-metals have 4 to 8 electrons in the outermost..

Natural resources that are limited in nature and are liable to be degraded in quantity and quality by human activities are exhaustible natural resources. Examples are forests, soil, wild animals, minerals, fossil fuels etc. The understanding of the environment and its..

Discovery of Radioactivity and Nature of Radiations - In 1896, the phenomenon of radioactivity was accidentally discovered by French scientist Henri Becquerel. He was performing experiments with uranium compounds. He accidentally placed a crystal of potassium uranyl sulphate over photogra..

In 1896, the phenomenon of radioactivity was accidentally discovered by French scientist Henri Becquerel. He was performing experiments with uranium compounds. He accidentally placed a crystal of potassium uranyl sulphate over photographic plate wrapped with usual black paper. On developing the p..

The formula S = n ( n + 1 ) 2 is used to find the sum of the first n natural numbers. Find the sum of the first 12 natural numbers. => 78 or 72 or 84 or 90..

The formula S = n ( n + 1 ) 2 is used to find the sum of the first n natural numbers. Find the sum of the first 30 natural numbers. => 435 or 15 or 477 or 465..