Among the elements of the 3rd period from Na to Ar, pick out the element:(a). with highest first ionization enthalpy
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Two elements 'A' and 'B' belong to the 3rd period of Modern periodic table and are in group 2 and 13 respectively.
( a) no. Of electrons in atom of "A " will be only 12 as they are in third period and must have 3 shells and no. Of electrons in...
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Among the elements of the 3rd period from Na to Ar, pick out the element: (b). with largest atomic radius.
(b). Na has large atomic radius (covalent radius).
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Among the elements of the 3rd period from Na to Ar, pick out the element: (c). that is most reactive non-metal.
(c). Cl is more reactive non-metal in 3rd period.
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Among the elements of the 3rd period from Na to Ar, pick out the element: (d). that is most reactive metal.
(d). Na is most reactive metal in third period.
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How would you explain the fact that the first ionization of Na is lower than that of Mg but its second ionization enthalpy is higher than that of Mg?
The electronic configurations of Na and Mg are: Na:1s2 2s2 2p6 3s1 And Mg: 1s2 2s2 2p6 3s2 thus, the first electron in both the cases has to be removed...
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Among the second period elements, the actual ionization enthalpies are in order: Li<B<Be<C<O<N<F<Ne.
(a).He has higher first ionization enthalpy than B because Be has more stable electronic configuration 1s2 2s2 than B 1s2 2s2 2p1 . (b). ∆iH1 of O is expected to be...
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From the elements: Cl, Br, F, O, Al, C, Li, Cs and Xe; choose the following: (a) The element with highest negative electron gain enthalpy.
(a). The element chlorine (Cl) has the highest negative electron gain enthalpy. (b). The element cesium (Cs) has lowest ionization enthalpy. (c). The element fluorine F has lowest atomic radius. (d). The element...
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Statement 1: Of all the elements, helium has the highest value of first ionization enthalpy.
(c) Correct Statement :Helium is the smallest inert gas.
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Three elements X, Y and Z belong to 17th group but 2nd, 3rd and 4th period respectively. Number of valence electrons in Y is 7.
It will be 7 in X as well as in Z The reason being that number of electrons in the outermost shell in the elements in same group is same.
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An element 'X' is placed in the 3rd group and 3'r period of the Modern Periodic Table.
Since the information given in the question is inaccurate, full marks are to be awarded to every candidate.
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