Among the second period elements, the actual ionization enthalpies are in order: Li<B<Be<C<O<N<F<Ne.

Monjur Alahi

Among the second period elements, the actual ionization enthalpies are in order:

Li

Explain why

(i). Be has higher first ionization enthalpy than B?

(ii). O has lower first ionization enthalpy than N and F?


0 like 0 dislike
6 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

(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 more than that of N but is actually lesser because the electronic configuration of N is more symmetrical as well as stable in comparison to O.∆i H1 of O is less than that of F because the ionization enthalpy in general increases along a period.

0 like 0 dislike
6 views
Talk Doctor Online in Bissoy App
If S and T are two sets such that S has 21 elements, T has 32 elements, and S ∩ T has 11 elements, how many elements does S ∪ T have

It is given that: n(S) = 21, n(T) = 32, n(S ∩ T) = 11 We know that: n (S ∪ T) = n (S) + n (T) – n (S...

1 Answers 1 views
If X and Y are two sets such that X has 40 elements, X ∪Y has 60 elements and X ∩Y has 10 elements, how many elements does Y have

It is given that:  n(X) = 40, n(X ∪ Y) = 60, n(X ∩ Y) = 10  We know that: n(X ∪ Y) = n(X) + n(Y) – n(X ∩ Y)  ∴ 60 = 40...

1 Answers 1 views
The increasing order of the first ionisation enthalpies of the elements B, P, S and F (lowest first) is.

(d) : Element:    B        S      P         F          I.E. (eV): 8.3    10.4  11.0    17.4 In general as we...

1 Answers 1 views
Assign reasons for the following: (i) The enthalpies of atomisation of transition elements are high.

(i) This is because transition metals have strong metallic bonds as they have a large number of unpaired electrons. (ii) The catalytic activity of transition metals is attributed to the following...

1 Answers 1 views
State reasons for the following observations: (i) The enthalpies of atomisation of transition elements are quite high.

(i) This is because, transition elements have strong metallic bonds due to presence of large number of unpaired electrons. (ii) This is because in transition elements incoming electron goes into d-orbitals...

1 Answers 1 views
Among the elements of the 3rd period from Na to Ar, pick out the element: (a). with highest first ionization enthalpy

(a). Ar has highest first ionization enthalpy.

1 Answers 1 views
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...

1 Answers 1 views
The increasing order of reactivity among group 1 elements is Li<Na<K<Rb<Cs whereas among the group 17 elements, it is F> Cl>Br>I. Explain.

In group 1 elements (alkali metals) the reactivity of the metals is mainly due to the electron releasing tendency of their atoms, which is related to ionization enthalpy, Since ionization,...

1 Answers 2 views
The ionization constant at 298 K is 1.8 x 10^-4 . Calculate the ionization constant of the corresponding conjugate base.

Ka x Kb =Kw  Kb= Kw/Ka  =1 x10-14/1.8x10-8  =5.55x10-7

1 Answers 1 views
Ionization of HCl is given below: HCl + HOH -----------> Cl- + H3O+ label the two conjugate acid- base pairs in the ionization.

 Cl - ion Conjugate base H3O+ ion Conjugate base,

1 Answers 1 views
X