1. which species does not have a noble gas electron configuration? s ar mg2+ na+
1. which species does not have a noble gas electron configuration? s ar mg2+ na+
Answer
Explanation:
Step1: Recall noble - gas electron configurations
Noble - gas electron configurations are stable electron arrangements where the outermost shell is fully filled.
Step2: Analyze each species
- Sulfur (S): Sulfur has 16 electrons. Its electron configuration is (1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}), which is not a noble - gas configuration.
- Argon (Ar): Argon is a noble gas with 18 electrons and electron configuration (1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}), a noble - gas configuration.
- Magnesium ion ((Mg^{2 +})): Magnesium has 12 electrons. (Mg^{2+}) has lost 2 electrons, so it has 10 electrons with electron configuration (1s^{2}2s^{2}2p^{6}), which is the same as neon (a noble gas), a noble - gas configuration.
- Sodium ion ((Na^{+})): Sodium has 11 electrons. (Na^{+}) has lost 1 electron, so it has 10 electrons with electron configuration (1s^{2}2s^{2}2p^{6}), which is the same as neon (a noble gas), a noble - gas configuration.
Answer:
S