four important steps

Steps in the Origin of Life - The earth when it was formed about 4.8 billion years ago, was a hot revolving ball of gas consisting of atoms of various elements. Heavy elements such as iron and nickel were found in the center while comparatively lighter ones like those of alumini..

The earth when it was formed about 4.8 billion years ago, was a hot revolving ball of gas consisting of atoms of various elements. Heavy elements such as iron and nickel were found in the center while comparatively lighter ones like those of aluminium and silicon formed the middle l..

Element Fluorides Chlorides Bromides Iodides O OF 2 Cl 2 O, ClO, Cl 2 O 7 Br 2 O I 2 O 5 S S 2 F 2 , SF 4 , SF 6 S 2 Cl 2 , SCl 2 S 2 Br 2 - Se Se 2 F 2 , SeF 4 , SeF 6 Se 2 Cl 4 , SeCl 4 SeBr 2 , SeBr 4 - ..

Maximum number of electrons that can be accommodated in a shell is given by 2n 2 where n=shell number For 1 s t energy level, n = 1 Maximum number of electrons in 1 s t energy level = 2n 2 2 x (1) 2 = 2 For 2 n d energy level n=2 Maximum number of electrons in the 2 n d energy le..

oxide Molecular formula Oxide Molecular formula Sodium oxide Na 2 O Iron(II) oxide FeO Potassium oxide K 2 O Iron(II)oxide Fe 2 O 3 Calcium oxide CaO Lead(II)oxide PbO Magnesium oxide MgO Lead(4)oxide PbO 2 Aluminum oxide Al 2 O 3 copper(II)o..

1) Energy is released in steps and in small amounts so it prevents sudden increase in body temperatue. 2) Wastage of energy is avoided, as more time is available to use and store the energy in ATP molecules. 3) Energy produced can be regulated according to body needs. 4) Interm..

Acid Molecular Formula Hydrochloric acid HCl Nitric acid HNO 3 Sulphuric acid H 2 SO 4 Phosphoric acid H 3 PO 4 Acetic acid CH 3 COOH Carbonic acid H 2 CO 3 Sulphurous acid H 2 SO 3 Nitrous acid HNO 2 ..

It is most commonly occurring intracellular(inside cytoplasm of cell)cation. It is involved in : 1.Many chemical activities inside cells 2.The contraction of muscles. 3.The transmission of nerve impluses. 4.The maintenance of the elect..

Which of the following represents a step function? => y = [ x ] or y = x + 2 or y = | x | + 4 or y = x..

The U.S. imported 600 million tons of cotton in the year 2000 and the imports fell to 500 million tons in the year 2001. Find the percent of decrease in the imports of cotton. => 16 2 / 3 or 16 3 / 4 or 16 1 / 3 or None of the above..