Actinoid Series and Periodic Trends

This set of flashcards covers the electronic configurations of the Actinoid series from Actinium to Lawrencium, as well as periodic trends regarding magnetic moments and ionic radii.

According to the transcript, what is the magnetic moment based on?

The number of impaired $e^-$.

What is the trend for the number of impaired electrons in the middle of the series?

Increases then decrease.

In the case of ions, what factor dominates across a period?

$$Leff$$

What is the electronic configuration listed for Actinium ($Ac$, atomic number $89$)?

$$[Rn]\,6d^1\,7s^2$$

What is the electronic configuration listed for Thorium ($Th$, atomic number $90$)?

$$6d^2\,7s^2$$

What is the electronic configuration listed for Protactinium ($Pa$, atomic number $91$)?

$$5f^2\,6d^1$$

What is the electronic configuration listed for Uranium ($U$, atomic number $92$)?

$$5f^3\,6d^1$$

What is the electronic configuration listed for Neptunium ($Np$, atomic number $93$)?

$$5f^4\,6d^1$$

What is the electronic configuration listed for Plutonium ($Pu$, atomic number $94$)?

$$5f^6\,7s^2$$

What is the electronic configuration listed for Americium ($Am$, atomic number $95$)?

$$5f^7\,7s^2$$

What is the electronic configuration listed for Curium ($Cm$, atomic number $96$)?

$$5f^7\,6d^1$$

What is the electronic configuration listed for Berkelium ($Bk$, atomic number $97$)?

$$5f^9\,7s^2$$

What is the electronic configuration listed for Californium ($Cf$, atomic number $98$)?

$$5f^{10}\,7s^2$$

What is the electronic configuration listed for Einsteinium ($Es$, atomic number $99$)?

$$5f^{11}\,7s^2$$

What is the electronic configuration listed for Fermium ($Fm$, atomic number $100$)?

$$5f^{12}\,7s^2$$

What is the electronic configuration listed for Mendelevium ($Md$, atomic number $101$)?

$$5f^{13}\,7s^2$$

What is the electronic configuration listed for Nobelium ($No$, atomic number $102$)?

$$5f^{14}\,7s^2$$

What is the electronic configuration listed for Lawrencium ($Lr$, atomic number $103$)?

$$5f^{14}\,6d^1\,7s^2$$

Based on the transcript, what is the correct order of Radius for the third option?

$$Te^{2-} > I^- > Se^{2-} > Br^- > P^{3-} > S^{2-}$$