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“Subatomic topic”

The verified answer to the Newsday Crossword clue “Subatomic topic”, with letter-by-letter analysis and the full puzzle context for the Friday, March 27, 2026 puzzle.

Published · Across · 4 letters

Hints first

Letters 4
First letter I
Last letter S
I ? ? S

A 4-letter across entry from the Friday puzzle

The Answer

I O N S

The answer to “Subatomic topic” is IONS

Letters 4
Direction Across
Published Mar 27, 2026

Letter analysis: the 4-letter answer

Vowels, consonants, and crossword construction notes
Unique 4 of 4 positions
Vowels 2 50% of word
Consonants 2 non-vowels
First letter I starts with

The clue “Subatomic topic” appeared in the Newsday Crossword on Friday, March 27, 2026 as a across entry. The verified answer is IONS — a 4-letter word that begins with I and ends with S.

This answer contains 2 vowels and 2 consonants. The Newsday Crossword is published daily by Newsday on Long Island and edited by Stan Newman, whose Saturday Stumper is widely considered one of the toughest mainstream crosswords in print.

Other clues with the answer IONS

IONS has been used as the answer for these Newsday Crossword clues
“Atoms with a charge” Jun 23, 2026 “Charged atoms” Jun 1, 2026 “Charged particles” Apr 7, 2026 “Charged atoms” Jan 18, 2026 “Atoms with charges” Dec 21, 2025 “Charged particles” Dec 14, 2025 “Air purifier output” Nov 15, 2025 “Charged atoms” Jul 14, 2025 “Smoke detector output” Apr 6, 2025 “Atoms with a charge” Feb 12, 2025 “Charged atoms” Feb 2, 2025

More clues from the March 27, 2026 puzzle

Friday Newsday Crossword
View full puzzle
Enduring dispute 4 ℓ · D Bear feet 4 ℓ · D Film rival of Boris 4 ℓ · D Vitamin water flavoring 4 ℓ · D Frequently 4 ℓ · D EPA-banned chemicals 4 ℓ · A College major 4 ℓ · A Poaching candidate 3 ℓ · D Pacific Rim cuisine with coconut rice 9 ℓ · D Hotel room amenity 4 ℓ · A Chip dip 5 ℓ · D Employ a fork for 4 ℓ · D Manitoba people 4 ℓ · D Form for the Bard 6 ℓ · D Take to heart 4 ℓ · D Uplands, for short 3 ℓ · A Takes courses at home 6 ℓ · D Mountain music 5 ℓ · D Left __ 11 ℓ · A City near Downton Abbey 4 ℓ · A

Frequently asked questions about “Subatomic topic”

What is the answer to “Subatomic topic” in the Newsday Crossword?

The verified answer is IONS — a 4-letter word that appeared as a across entry on Friday, March 27, 2026.

How many letters is the answer to “Subatomic topic”?

The answer IONS contains 4 letters.

Was “Subatomic topic” an across or down clue?

This clue ran as a Across entry.

Is this site affiliated with Newsday?

No. This is an independent fan reference site — we are not affiliated with Newsday. The Newsday Crossword is a trademark of its respective owner. We solve and verify each Newsday Crossword puzzle manually before publishing the answer key.

Subatomic topic — Newsday Crossword Clue Answer | Newsday Crossword Answers