The neon atom is noble. Though Neon is a relatively small atom with a relatively

Question

The neon atom is noble. Though Neon is a relatively small atom with a relatively high nuclear charge, it is difficult to add an electron to a neon atom. Which of the following is the best explanation of Neon has such a large number of electrons already that the electron-electron repulsion is too great to overcome. this phenomenon? The next electron added to neon would have to be placed in a higher energy level (the n 3 level). The next electron added to neon would have to go into an s orbital, and s orbitals are harder to fill than p orbitals.

Explanation / Answer

Option c is the best explanation.

Atomic number of neon is 10 and the 10 electrons are filled in the arbitals as follows:

n = 1, 1s2

n = 2, 2s2, 2p6.

Since at n = 2, there are no d orbitals, the orbitals are fully occupied and reached a lowest energy state.

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