Atomic Radii

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005095564
Posts: 30
Joined: Wed Sep 18, 2019 12:18 am

Atomic Radii

Postby 005095564 » Sun Nov 03, 2019 6:23 pm

When do we use atomic radius in problems? What is it useful for and what exactly is it?

Jada Brown 2H
Posts: 100
Joined: Sat Aug 17, 2019 12:15 am

Re: Atomic Radii

Postby Jada Brown 2H » Sun Nov 03, 2019 6:25 pm

A couple things atomic radii is useful in: determining bond length, determining periodic trends such as ionization energy and electron affinity, determining compound size, etc.

Maria Poblete 2C
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

Re: Atomic Radii

Postby Maria Poblete 2C » Sun Nov 03, 2019 8:46 pm

I don't think we'll ever need to calculate the value of an atomic radius, but we should know the trends of increasing/decreasing atomic radii across periods or groups of the periodic table. For example, the atomic radius gets smaller as you go from left to right in a period because the higher positive charge (atomic number) pulls the electrons closer and closer.

britthanul234
Posts: 51
Joined: Wed Sep 18, 2019 12:21 am

Re: Atomic Radii

Postby britthanul234 » Tue Nov 05, 2019 10:06 pm

You should know the period trend for atomic radii. It increases as it goes down and left of the periodic table.

Anokhi Patel 2B
Posts: 76
Joined: Fri Aug 09, 2019 12:17 am

Re: Atomic Radii

Postby Anokhi Patel 2B » Fri Nov 08, 2019 4:09 pm

We can use atomic radii to determine the strength of the attraction of electrons to the atom compared how well the nucleus holds the electrons together.

RichBollini4G
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

Re: Atomic Radii

Postby RichBollini4G » Sat Dec 07, 2019 5:19 pm

Anokhi Patel 4G wrote:We can use atomic radii to determine the strength of the attraction of electrons to the atom compared how well the nucleus holds the electrons together.

Very helpful!

Annika Zhang 1F
Posts: 49
Joined: Sat Jul 20, 2019 12:15 am

Re: Atomic Radii

Postby Annika Zhang 1F » Sat Dec 07, 2019 6:51 pm

atomic radii is especially useful for determining strength of bonds, bond length, and periodic trends like electronegativity.

105289321
Posts: 49
Joined: Sat Sep 07, 2019 12:15 am

Re: Atomic Radii

Postby 105289321 » Sat Dec 07, 2019 9:32 pm

Good for determining bond length/strength

ramiro_romero
Posts: 90
Joined: Sat Sep 07, 2019 12:16 am

Re: Atomic Radii

Postby ramiro_romero » Sat Dec 07, 2019 11:19 pm

For strength in bonds will be most likely for the final. To the left and down are the trends for increasing atomic radii. The larger the distance between the centers of the atoms, the weaker the bonds. The weaker the bond, the stronger the acid and base (because a strong acid and base will completely dissociate in water).

sbottomley3a
Posts: 50
Joined: Wed Sep 18, 2019 12:19 am

Re: Atomic Radii

Postby sbottomley3a » Sat Dec 07, 2019 11:58 pm

It's very useful for determining bond strength and length! I don't think they can ask us to calculate it because it would need to be experimentally confirmed.

simona_krasnegor_1C
Posts: 16
Joined: Wed Sep 30, 2020 9:35 pm

Re: Atomic Radii

Postby simona_krasnegor_1C » Sat Oct 17, 2020 10:38 am

Something interesting that I read that I thought was worth sharing is that the term atomic radius can refer to an ionic radius, covalent radius, metallic radius, or van Der Waals radius!

Binyu You
Posts: 22
Joined: Wed Sep 30, 2020 9:37 pm

Re: Atomic Radii

Postby Binyu You » Thu Oct 29, 2020 10:04 am

I guess you need to understand how the trend of atomic radius is in periodic table. It can be used to determine trends such as electron affinity and ionization energy. So it is still fairly important to know.


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