# What element has a ground state electronic configuration of [Kr]5s^2 4d^5?

Aug 11, 2016

That would be technetium, element 43.

#### Explanation:

When dealing with the periodic table and electron structures, it's good to know the atomic numbers of the noble gases:

Helium = 2
Neon = 10
Argon = 18
Krypton = 36
Xenon = 54