What is the new element tony stark created

You're referring to the fictional element created by Tony Stark, aka Iron Man!

In the Marvel Cinematic Universe (MCU), Tony Stark creates a new element called "Element 115" in the movie "Iron Man 3" (2013). This element is a super-powerful and highly reactive metal that is capable of generating immense energy.

In the movie, Tony Stark uses Element 115 to create a new arc reactor, which is a more advanced and powerful version of the arc reactor that powers his Iron Man suits. The new arc reactor is capable of generating a massive amount of energy, which Tony uses to power his suit and defeat the villain, Aldrich Killian.

Element 115 is not a real element, but rather a fictional concept created for the movie. However, it's worth noting that there is a real element with the atomic number 115, which is called Moscovium (Mc). It's a synthetic element that was first synthesized in 2003 and has a half-life of just 220 milliseconds.