Question

What does the electronic configuration $1s^2,2s^2,2p^5,3s^1$ indicate?

• A. Ground state of fluorine
• B. Excited state of fluorine
• C. Excited state of neon
• D. Excited state of the $O_2^{-}$ ion

Answer 1

The correct option is C Excited state of neon

The atomic number of Neon is $10$
G.S $Ne\left[10\right]:1s^2,2s^2,2p^5$
E.S $Ne\left[10\right]:1s^2,2s^2,2p^5,3s^1$
Hence $1s^2,2s^2,2p^5,3s^1$ electronic configuration indicates the excited state of neon