Ionization Enthalpy is defined as the amount of energy required to remove an atom's electron (can be valence or consecutive) ..... this definition doesn't sound so complex. The definition of Electron Gain Enthalpy - it is the amount of energy required to add an electron. But, what is Electron Affinity ? One book says it is the negative of electron gain enthalpy. Then, there is some thermodynamic rule saying negative value of electron gain enthalpy indicates that energy has to be supplied and positive value indicates energy is released. My question is how can electron gain enthalpy have both negative and positive values but ionisation enthalpy doesn't have. Also please explain what the differnece between affinity and gain enthalpy is.Thanks in advance ....
Proof the diagonal relationship between Li and Mg
Be and Al
B and Si
periodic table
s d p f
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Ionization Enthalpy is defined as the amount of energy required to remove an atom's electron (can be valence or consecutive) ..... this definition doesn't sound so complex. The definition of Electron Gain Enthalpy - it is the amount of energy required to add an electron. But, what is Electron Affinity ? One book says it is the negative of electron gain enthalpy. Then, there is some thermodynamic rule saying negative value of electron gain enthalpy indicates that energy has to be supplied and positive value indicates energy is released. My question is how can electron gain enthalpy have both negative and positive values but ionisation enthalpy doesn't have. Also please explain what the differnece between affinity and gain enthalpy is.Thanks in advance ....
Proof the diagonal relationship between Li and Mg
Be and Al
B and Si
(1) CO2 < SiO2 < SnO2 < PbO2 : increasing oxidising power
(2) B < C < O < N : increasing first ionisation enthalpy
(3) NH3 < PH3 < AsH3 < SbH3 : increasing basic strength
(4) HF < HCl < HBr < HI : increasing acid strength
periodic table
s d p f
[O, S], [C, N], [O, N], [N, P], [Cl+, F+], [K+, Na+]
BaO and SrO
Please explain..
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of the periodic table. Write down the general outer electronic configuration of the ten elements from La to Hg together using orbital notation method.