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Sagot :
To determine the noble gas notation for chlorine, we need to consider its atomic number and its electron configuration.
1. Chlorine's Atomic Number:
- Chlorine (Cl) has an atomic number of 17. This means that an atom of chlorine has 17 protons and, when neutral, 17 electrons.
2. Start with the Noble Gas Configuration:
- The nearest noble gas preceding chlorine is Neon (Ne), which has an atomic number of 10. So, Neon has 10 electrons.
3. Electron Configuration of Neon:
- The electron configuration of Neon (Ne) is:
[tex]\[ 1s^2 2s^2 2p^6 \][/tex]
- This configuration accounts for all 10 electrons in a Neon atom.
4. Remaining Electrons for Chlorine:
- Since Neon has 10 electrons, chlorine has [tex]\(17 - 10 = 7\)[/tex] more electrons to configure.
5. Adding the Remaining Electrons:
- After Neon, the next available orbitals are 3s and 3p.
- The 3s orbital can hold up to 2 electrons.
[tex]\[ 3s^2 \][/tex]
- Adding these 2 electrons brings the total to 12 electrons (10 from Neon + 2).
- The remaining 5 electrons will go into the 3p orbital.
[tex]\[ 3p^5 \][/tex]
- Thus, adding these 5 electrons completes the configuration:
[tex]\[ 3p^5 \][/tex]
6. Complete Noble Gas Notation for Chlorine:
- Combining the configuration of Neon with the added electrons, we get the complete electron configuration for chlorine:
[tex]\[ [Ne] 3s^2 3p^5 \][/tex]
Thus, the correct noble gas notation for chlorine (Cl) is:
[tex]\[ [ Ne ] 3s^2 3p^5 \][/tex]
Therefore, the correct answer is:
[tex]\[ \boxed{[ Ne ] 3s^2 3p^5} \][/tex]
1. Chlorine's Atomic Number:
- Chlorine (Cl) has an atomic number of 17. This means that an atom of chlorine has 17 protons and, when neutral, 17 electrons.
2. Start with the Noble Gas Configuration:
- The nearest noble gas preceding chlorine is Neon (Ne), which has an atomic number of 10. So, Neon has 10 electrons.
3. Electron Configuration of Neon:
- The electron configuration of Neon (Ne) is:
[tex]\[ 1s^2 2s^2 2p^6 \][/tex]
- This configuration accounts for all 10 electrons in a Neon atom.
4. Remaining Electrons for Chlorine:
- Since Neon has 10 electrons, chlorine has [tex]\(17 - 10 = 7\)[/tex] more electrons to configure.
5. Adding the Remaining Electrons:
- After Neon, the next available orbitals are 3s and 3p.
- The 3s orbital can hold up to 2 electrons.
[tex]\[ 3s^2 \][/tex]
- Adding these 2 electrons brings the total to 12 electrons (10 from Neon + 2).
- The remaining 5 electrons will go into the 3p orbital.
[tex]\[ 3p^5 \][/tex]
- Thus, adding these 5 electrons completes the configuration:
[tex]\[ 3p^5 \][/tex]
6. Complete Noble Gas Notation for Chlorine:
- Combining the configuration of Neon with the added electrons, we get the complete electron configuration for chlorine:
[tex]\[ [Ne] 3s^2 3p^5 \][/tex]
Thus, the correct noble gas notation for chlorine (Cl) is:
[tex]\[ [ Ne ] 3s^2 3p^5 \][/tex]
Therefore, the correct answer is:
[tex]\[ \boxed{[ Ne ] 3s^2 3p^5} \][/tex]
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