Question

What is the element whose electronic configuration is:
`1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 4 s^2 3 d^(10) 4 p^6 5 s^2 4 d^(10) 5 p^1` ?

Answer 1

Indium (49)

Step-by-step explanation:

You can also add all the small numbers up to find the atomic mass of the element, in this case, all the small numbers add up to 49, so if you look for 49 on a periodic table you will find that it is Indium.