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Ionization energy

Posted: Mon Nov 19, 2018 1:36 pm
by Madelyn Cearlock
Can someone please explain why Na has a lower first ionization energy compared to Mg?

Re: Ionization energy

Posted: Mon Nov 19, 2018 2:01 pm
by klarratt2
Ionization energy is the energy required to remove an electron from a gaseous atom or ion.

Magnesium is in the second group and therefore is smaller than sodium DUE TO ADDITION OF A PROTON. This proton is positive and attracts the outer electrons CLOSER to the NUCLEUS which therefore means it is harder to remove the outer electron from magnesium than sodium.

Re: Ionization energy

Posted: Mon Nov 19, 2018 2:06 pm
by tierra parker 1J
ionization energy is the energy to remove an electron and it decreases as you move across a period. it decreases because the more electrons an atom has the stronger the attraction it has towards the nucleus making it harder to remove an electron. magnesium has more electrons so it is harder to remove one electron which means higher ionization energy

Re: Ionization energy

Posted: Sun Nov 25, 2018 5:33 pm
by Liza Hayrapetyan-3K
This is because ionization energy decreases as you move across a period.

Re: Ionization energy

Posted: Sun Nov 25, 2018 5:37 pm
by Emily Li 4A
I usually visualize trends with the help of this table, which is very useful for questions like these:

https://upload.wikimedia.org/wikipedia/commons/f/fe/Periodic_trends.svg