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A single covalent bond is build when two atoms share a pair of electrons. Triple and double bonds can be formed when two or three such pairs are shared. A Lewis structure is a representation of a complex ion or molecule that shows the disposition of valence electrons (inner shells are not drawn) around each atom. 1-4 show Lewis structures of CH4, O2, H2O and N2, the last two molecules having a double and triple bond, respectively. These representations are entirely equivalent to the valence structures (1′-4′) in which each bonding pair of electrons are represented by a line.
Q. What is alpha radiation? Types of radiation there are three principal types of radiation are given off during radioactive decay. One kind is alpha radiation (α-radiation)
Maximum number of electrons present in N shell is: (1) 18 (2) 32 (3) 2 (4) 8 Ans: 32
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Estimation of hardness of water sample by EDTA
The difference between an ideal gas and a real gas is that real gases will not strictly follow the laws established for ideal gases, because of real-world characteristics. An idea
examples and uses of separation technique
calculate the voltage of the cell mg/mg+//cd2+/cd at 250c.when[cd2+]=7*10-11 M,[mg2+]=1.0M and standerd electrode potential=1.97V.
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Q. Show reversible and exothermic reaction? The fact that SO 2 , can be oxidised to SO 3 , by air in the presence of platinum catalyst is the basis of the contact process which
what are alkanes
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