Ionization energy

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Madelyn Cearlock
Posts: 72
Joined: Fri Sep 28, 2018 12:19 am

Ionization energy

Postby Madelyn Cearlock » Mon Nov 19, 2018 1:36 pm

Can someone please explain why Na has a lower first ionization energy compared to Mg?

klarratt2
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: Ionization energy

Postby klarratt2 » Mon Nov 19, 2018 2:01 pm

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.

tierra parker 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Re: Ionization energy

Postby tierra parker 1J » Mon Nov 19, 2018 2:06 pm

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

Liza Hayrapetyan-3K
Posts: 31
Joined: Fri Sep 28, 2018 12:25 am

Re: Ionization energy

Postby Liza Hayrapetyan-3K » Sun Nov 25, 2018 5:33 pm

This is because ionization energy decreases as you move across a period.

Emily Li 4A
Posts: 24
Joined: Fri Sep 28, 2018 12:27 am

Re: Ionization energy

Postby Emily Li 4A » Sun Nov 25, 2018 5:37 pm

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


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