Question

Identify the neutral element represented by this excited-state electron configuration, then write the ground-state electron configuration for that element. excited state: 1s22s22p5351 element symbol: ground state:

Answer 1

From the given excited state electronic configuration, we can see that

Total number of electrons in given element

=Sum of number of electrons in 1s, 2s, 2p and 3s orbitals

=2+2+5+1=10

In a neutral atom of an element, number of positively charged protons=Number of negatively charged electrons.

So 10 is the atomic number of Neon. So the symbol of the element is Ne.

So the ground state electron configuration of given element is 1s²2s²2p⁶.