What is the Periodic Trend for Ionization Energy
Key Points:
- What is Ionization Energy in simple words
- Ionization Energy Examples
- Ionization Energy Units
- Is ionization Energy endothermic or exothermic reaction
- Ionization Energy Trends
What is ionization energy in simple words?
In simple words, ionization Energy is defined as the minimal amount of energy necessary to remove the outermost electron from an isolated neutral gaseous atom.
This will result in the formation of a positively charged gaseous ion (cation).
e.g.


The minimum amount of energy required to remove the outermost electron from an isolated, neutral gaseous sodium (Na) atom is known as Ionization Energy. This will result in the formation of a positively charged gaseous sodium ion (cation).
Ionization Energy Unit:
- eV (electron volts)
- KJ/mol
1 eV = 1.6 X 10 19 J
1 eV / atom = 96 KJ /mol
Recommended video:
Is ionization Energy endothermic or exothermic reaction?
As the ionization process requires an energy input ( absorbed energy ) to remove the negatively charged electron from an atom. Therefore, ionization energy is an endothermic reaction as it absorbs energy and enthalpy is always positive.

Ionization Energy Periodic Table Trends across the Period:
It is generally observed that as we move from left to right in a periodic table, the ionization energy increases because the electrons are held tighter by the increase in the effective nuclear charge and the decrease in the atomic size.

Ionization Energy Trends down the Group:
It is generally observed that as we move from top to bottom in a periodic table, the ionization energy decreases because the electron shells increases, resulting in the decrease of the effective nuclear charge and the increase in the atomic size.

Recommended video:
Also Check !!
Related Posts
10th Class Chemistry Free Downloadable pdf Notes
11th Class Chemistry Chapterwise Free pdf Notes
12th Class Chemistry Free Downloadable
Visit Digital Kemistry YouTube Channel for Free Chemistry Tutorials Now
This post will help the internet people for building up new blog or even a weblog from start to end.
Hello to every one, it’s truly a pleasant for me to go to see this site,
it consists of precious Information.
Helpful information. Fortunate me I discovered your
site by accident, and I’m surprised why this coincidence
did not took place earlier! I bookmarked it.
Also visit my web page :: MosQiller S
It’s very simple to find out any topic on web as compared to textbooks, as I found this article at this site.
Here is my website; Rapid Fire Keto Review
Hello There. I found your weblog using msn. This is an extremely
smartly written article. I will make sure to bookmark it
and come back to read extra of your useful info. Thank you for
the post. I will certainly comeback.
My webpage: Vinyasa Anti Aging Cream
If you desire to get a good deal from this piece of writing
then you have to apply these techniques to your won website.
Here is my page – Vinyasa Anti Aging Cream
Hello there! I could have sworn I’ve visited this site before but after going through some
of the articles I realized it’s new to me. Anyways, I’m certainly delighted I found it and I’ll
be bookmarking it and checking back regularly!
Thanks on your marvelous posting! I really enjoyed reading it, you can be a great author.
I will ensure that I bookmark your blog and may come back from now on. I want
to encourage you to definitely continue your great writing, have a nice day!
my web page Rapid Fire Keto Pills
You should take part in a contest for one of the best blogs on the web.
I most certainly will highly recommend this site!
Visit my web site – Clean Cut Keto Review
As soon as I found this internet site I went on reddit to share some of the love with them.
Here is my web blog :: http://www.danskhumor.dk