Question

question 10
1s²2s²2p⁶3s²3p⁶
select state
number of electrons= select
element= select

Explanation:

Step1: Calculate number of electrons

Add up electrons in each sub - shell. $2 + 2+6 + 2+6=18$.

Step2: Determine element

An element with 18 electrons is Argon (Ar).

Step3: Determine state

Since the electron configuration is a complete noble - gas configuration, it is in the ground state.

Answer:

state: Ground
number of electrons: 18
element: Argon (Ar)