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nkirotedoreen46

Answer:

s-sub-level and p-sub-level

Explanation:

  • Group 18 elements in the periodic table are known as noble gases.
  • They have an octet configuration with their outermost s and p-sub-levels full, which makes them inert or nonreactive.
  • The s-sub-level takes up a maximum of 2 electrons while the p-sub-level holds a maximum of 6 electrons.
  • They include, argon, neon, xenon, krypton, etc.
  • Their electron configuration shows full outermost s and p-sub-levels.
  • For example; the electron configuration of Ne is 1s²2s²2p⁶, with full s and p sub-levels.

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