To determine the noble gas notation for chlorine, we need to consider its electron configuration. Chlorine has an atomic number of 17, which means it has 17 electrons.
First, let's recall the order in which electron orbitals are filled. The filling order is as follows:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, ...
Given this, the full electron configuration of chlorine is:
[tex]\[ 1s^2 2s^2 2p^6 3s^2 3p^5 \][/tex]
To convert this into noble gas notation, we replace the core electrons with the electron configuration of the nearest noble gas of lower atomic number. The noble gas preceding chlorine in the periodic table is neon (Ne), which has an atomic number of 10. The electron configuration of neon is:
[tex]\[ 1s^2 2s^2 2p^6 \][/tex]
Therefore, the electron configuration of chlorine beyond the core electrons of neon is:
[tex]\[ 3s^2 3p^5 \][/tex]
Combining the noble gas configuration with the remaining electrons, the noble gas notation for chlorine is:
[tex]\[ [Ne] 3s^2 3p^5 \][/tex]
So, the correct answer is:
[tex]\[ [Ne] 3s^2 3p^5 \][/tex]
