Identify the element that has a ground state electronic configuration of [kr]5s24d5.

Elements in their ground state are neutral, so the number of electrons they have is equivalent to the number of protons. The electrons in this element are:
36 (from Kr) + 2 in the 5s orbital + 5 in the 4d orbital
= 43 electrons

So the protons must also be 43. Looking at the periodic table at atomic number 43, we see that this element is Technetium

Dmight be the correct answer

Hydrogen is the most abundant element on the periodic table..hope it .