InterviewSolution
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InterviewSolution
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(a) What do you understand by lone pair and shared pair?(b) (i) How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?(ii) How many electrons are required for their octet structure? |
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Answer» (a) A pair of electrons which is not shared by any other atom is called lone pair of electrons.The electrons of valence shell shared by two atoms to form a covalent bond are called shared pair of electrons. (b)(i) Calcium and oxygen make up Calcium oxide. Calcium needs to lose 2 electrons while oxygen needs to gain 2 electrons to complete octet structure. ii) Two atoms of hydrogen and an atom of oxygen make up water molecule. .Hydrogen atoms need to gain one electron to complete its duplet while oxygen needs to gain 2 electrons to complete octet structure. (ii) In carbon tetrachloride, there is one carbon and 4 chlorine atoms. Each of the four chlorine atoms needs to gain one electron to complete its octet while carbon needs to gain 4 electrons to complete octet state. |
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