Question

What is the first element....
And what is it's electronic configuration.....
Explain??

Answer 1

Answer:

1-Hydrogen

Hydrogen is known to be the first element in the periodic table of elements. It has one proton in its nucleus and one outter electron.

2- 1s1

Answer 2

Answer:

the first element is hydrogen

it's electronic configuration is.......

$\frac{k}{1}$

since hydrogen has only one electron it is located in the first energy shell i.e. k shell