Periodic Trends

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Briana Perez 3A
Posts: 35
Joined: Fri Sep 28, 2018 12:23 am

Periodic Trends

Postby Briana Perez 3A » Mon Oct 29, 2018 9:14 pm

Does anyone have an easy way to remember all the periodic trends that occur?
Please share if so!
Thanks

Iris Bai 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: Periodic Trends

Postby Iris Bai 2K » Mon Oct 29, 2018 10:02 pm

All size ones generally increase to the bottom left, and all reactivity ones generally increase to the top right, but understanding the reasoning makes it a lot easier.

Mallory_Podosin_1H
Posts: 31
Joined: Fri Sep 28, 2018 12:15 am

Re: Periodic Trends

Postby Mallory_Podosin_1H » Thu Nov 01, 2018 5:12 pm

For Ionization energy, electron affinity, and electronegativity it Decreases Down and increases across
For atomic radius I just remember that its the other way around

005113695
Posts: 59
Joined: Fri Sep 28, 2018 12:15 am

Re: Periodic Trends

Postby 005113695 » Fri Nov 02, 2018 7:34 pm

Ionization energy and electronegativity both increase up and to the right.
Atomic radius increases down and to the left.

ThomascnguyenDis1J
Posts: 30
Joined: Fri Sep 28, 2018 12:16 am

Re: Periodic Trends

Postby ThomascnguyenDis1J » Sun Nov 04, 2018 2:05 pm

Some exceptions include the ionization energy of Oxygen and Nitrogen. Nitrogen has a lower ionization energy than Oxygen because Nitrogen's half sub shell offers it more stability than Oxygen.

lukezhang2C
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: Periodic Trends

Postby lukezhang2C » Sun Nov 04, 2018 9:58 pm

For Atomic Radius it increases as it goes down due to the added number of shells to house the electrons

Anjali 4A
Posts: 59
Joined: Fri Sep 28, 2018 12:28 am

Re: Periodic Trends

Postby Anjali 4A » Sun Nov 04, 2018 10:30 pm

I usually draw the periodic trends out, so for ionization energy and electronegative since it increases as you go across, and decreases as you go down, I would draw two arrows across the periodic table - the side with the arrow indicating the higher ionization energy/electronegativity. I would then draw the opposite for atomic radius/ionic radius.

Lydia Luong 4L
Posts: 59
Joined: Fri Sep 28, 2018 12:24 am

Re: Periodic Trends

Postby Lydia Luong 4L » Sun Nov 04, 2018 10:34 pm

For me, for electronegativity, I just remember that Fluorine is the most electronegative element.

Maxwell S 3E
Posts: 15
Joined: Fri Sep 28, 2018 12:24 am

Re: Periodic Trends

Postby Maxwell S 3E » Sun Nov 04, 2018 11:01 pm

I would try and think about trends, and just begin to understand how something would change in each trend. For example, atomic radius: For the metallic atoms, the have in their standard structure, fewer protons than the gaseous structures. Due to this, there is a higher level of energy pulling into the nucleus with the right side of the table. From there we can say that the radius increases right to left and then increases top-down.

Katelyn Phan 2A
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Periodic Trends

Postby Katelyn Phan 2A » Mon Nov 05, 2018 9:49 am

Without considering exceptions, I like to think the trend from least to greatest.
For size you have increasing going left and down.
and almost anything else (ionization energy, electronegativity, etc.) is increasing going up and right.

Henry Dudley 1G
Posts: 61
Joined: Fri Sep 28, 2018 12:16 am

Re: Periodic Trends

Postby Henry Dudley 1G » Fri Nov 09, 2018 9:14 am

I think the easiest way to remember electronegativity, ionization energy, electron affinity, and atomic radius is that the first three all increase across a period, but decrease down a group. However, atomic radius is the exact opposite of that meaning if you can remember atomic radius and you can remember the other are opposite of that you know all the trends.


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