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Ionic Bond formation

Posted: Sun May 06, 2018 9:31 pm
by Leslie Contreras 1D
when you add the electron to Calcium the energy required is 494
where is that number found?
what constitutes as required a cation needing to push an electron or is that released because of the electron leaves?

Re: Ionic Bond formation

Posted: Sun May 06, 2018 9:46 pm
by Susu Le 1F
That energy is required to overcome the effective nuclear charge that is acting on the electron.

Re: Ionic Bond formation

Posted: Sun May 06, 2018 10:14 pm
by Leslie Contreras 1D
Susu Le 1F wrote:That energy is required to overcome the effective nuclear charge that is acting on the electron.


SORRY I still do not understand

Re: Ionic Bond formation

Posted: Sun May 06, 2018 10:21 pm
by SammiOrsini_1B
if the energy required is 494 would we be expected to find this number or is the number given? I have no idea how to find that number

Re: Ionic Bond formation

Posted: Tue May 08, 2018 10:39 am
by Paywand Baghal
SammiOrsini_1B wrote:if the energy required is 494 would we be expected to find this number or is the number given? I have no idea how to find that number


it should be given, but I believe we just need to know the topic and be able to use any information given, not to memorize.

Re: Ionic Bond formation

Posted: Tue May 08, 2018 4:02 pm
by Chem_Mod
If you are referring to the ionization energy of Na, this energy must be added to the atom to separate the electron from the rest of the atom:

Na + 494 kJ/mol --> Na+ + e-

The ionization energy is usually measured experimentally.