Fluorine or chlorine, e.g. Crossword Clue

We have the 7-letter answer for Fluorine or chlorine, e.g. crossword clue, last seen in the WSJ Crossword March 25, 2026 puzzle. Let us help you solve the crossword clue that has you stumped so you can finish the puzzle.

Fluorine or chlorine, e.g. Crossword Answer

→21.

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GAS

(3 letters)

Helpful Hints

(noun)
1. any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions

Hint 2: Clue Definitions

FLUORINE (noun)
1. a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
CHLORINE (noun)
1. a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)

Hint 3: Other Answers Used in the Past

GAS
(3 letters)

More WSJ Crossword (3/25/2026) Answers

Across

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30. Free, as an ox

31. Make a loud sound

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36. Unfulfilled agreement, and what you’ll find in each set of circles

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42. "Am so!" retort

43. Part of Eritrea’s border

47. They may come with clubs

50. Colombian president Petro

52. Bill holders

54. Be triumphant

56. Concerning

57. Wiccan gathering

60. Preceded

62. Let up

63. Muscle targeted on a rowing machine

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All Answers

Down

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2. Like vinegar

3. Do-re-mi following

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7. December song

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10. Campaign creator

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28. Stephen of "The Crying Game"

32. “Ballerina” star de Armas

33. "Fresh Air" airer

34. Test for Ph.D. wannabes

36. Cordon couleur

37. Purges (of)

38. Reduced

39. Gangster's girl

40. Talk of Torino

41. S. Amer. nation

44. Florida beach town, familiarly

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46. Hail, to Caesar

48. Attended

49. Run in the raw

51. Squashed circles

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57. Dash or web follower

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61. “Gee, thanks for that hot tip!”

All Answers