In my vocabulary crossword puzzle, I have one clue answer left to fill in the puzzle, but the clue doesn't match anything that even EXISTS:

9. A group 18 element (on the periodic table)

Answer so far: N??E?????S

NONE of the group 18 elements fit in here, though. And I triple-checked my other clue answers because they were in the exact glossary for the chapter, except for this clue and a few others.

Does anyone have any idea what could go in this answer space?? Any help is GREATLY appreciated!!

Group 18 is He, Ne, Ar, Kr, Xe, Rn

Helium
Neon
Argon
Krypton
Xenon
Radon
With so few to choose from I suggest some of your other words may be incorrect.

To solve this vocabulary crossword puzzle clue, you are looking for a Group 18 element on the periodic table. There might be a possibility that the clue or the crossword puzzle is incorrect. However, let's explore other options and strategies to find a potential answer.

1. Review the periodic table: Double-check the periodic table to ensure you haven't missed any Group 18 elements. The Group 18 elements are also known as noble gases, which include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Make sure you haven't overlooked any of these options.

2. Consider alternative phrasing: Occasionally, crossword puzzles may use different terminologies or alternate names for elements. For example, the clue might refer to "inert gases" or "noble gases" instead of "Group 18 elements". Ensure you are familiar with different descriptions for the same characteristic.

3. Seek external help: If you've exhausted all possibilities and still can't find a suitable answer, consider seeking help from others. You may reach out to friends, classmates, or online puzzle-solving communities where people can share their thoughts and ideas.

4. Contact the puzzle creator: If the puzzle was created by a teacher or textbook author, try reaching out to them for clarification. They may have made an error in the clue or could provide additional information to assist you in solving the puzzle.

Remember, it's essential to go through the previous answers and clues carefully to ensure they are accurate. Good luck in completing your crossword puzzle!