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

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

Posts: 100
Joined: Sat Aug 17, 2019 12:15 am

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

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

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

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

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.

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

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

Good for determining bond length/strength

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

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

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

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