Ionization Energy
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 15
- Joined: Wed Sep 21, 2016 2:57 pm
Ionization Energy
For choosing a central atom for model it says to choose the atom with the least amount of ionization energy how would you determine this?
-
- Posts: 10
- Joined: Wed Sep 21, 2016 2:57 pm
Re: Ionization Energy
You can use the general ionization energy trend from the periodic table to find which atom has less ionization energy. Ionization energy (IE) decreases as you move left and down the Periodic Table. You can also use the opposite and say IE increases as you move right and up the table. (I added a picture)
-
- Posts: 22
- Joined: Fri Jul 22, 2016 3:00 am
Re: Ionization Energy
Use the periodic table. Remember that right side and upper elements have higher ionization energies, so the upper right hand corner of the table has elements with the highest ionization energies and the lower left hand corner has the lowest. So if you're comparing two, say Sulfur and Fluorine, Sulfur would have a lower ionization energy and would act as the center element in a Lewis Dot Structure. Here are a few more examples:
Phosphorus or Nitrogen: Phosphorus is lower
Sulfur or Chlorine: Sulfur is lower
Potassium and Chlorine: Potassium is lower
Phosphorus or Nitrogen: Phosphorus is lower
Sulfur or Chlorine: Sulfur is lower
Potassium and Chlorine: Potassium is lower
-
- Posts: 16
- Joined: Wed Sep 21, 2016 2:57 pm
-
- Posts: 11
- Joined: Sat Jul 09, 2016 3:00 am
Re: Ionization Energy
Yes, the second ionization energy will always be more than the first for every atom because it will take more energy to remove the second electron, since before it is positively charged, making it easier to remove the electron. When it becomes neutral, it's harder to remove the electron.
-
- Posts: 19
- Joined: Fri Jul 22, 2016 3:00 am
- Been upvoted: 1 time
Re: Ionization Energy
Tiffany Chen 3E wrote:Yes, the second ionization energy will always be more than the first for every atom because it will take more energy to remove the second electron, since before it is positively charged, making it easier to remove the electron. When it becomes neutral, it's harder to remove the electron.
Wait, did you mean the opposite? Before removing the first electron, the atom is neutral, making it easier to remove an electron. Once the first electron is removed, the atom is positively charged, making it that much harder to remove the 2nd one.
-
- Posts: 22
- Joined: Fri Jul 15, 2016 3:00 am
-
- Posts: 23
- Joined: Wed Sep 21, 2016 2:58 pm
Re: Ionization Energy
LeontyneHenderson4J wrote:Is the second ionization energy always more than the first for every atom?
The second ionization energy is always stronger because there will be a greater ratio of protons to electrons. During the first ionization of an element there is an equal number of protons and electrons. However, during the second ionization, there are more protons then electrons which means there is a stronger pull towards the center of an atom, thus making it more difficult to remove an electron.
Return to “Ionic & Covalent Bonds”
Who is online
Users browsing this forum: No registered users and 1 guest