First Five for January 12 and 13

Identify the missing particle in the following equation. What type of decay is taking place?

$_{92}^{235}\textrm{U} \to\; _{90}^{231}\textrm{Th}\; +$

Identify the particle formed when an atom of aluminum-28 undergoes beta decay.

I am the owner-developer of Sciencegeek.net and a science teacher at El Diamante High School in Visalia, CA.

Posted in Chemistry, First Five