Number of protons by which the elements in the four longest puzzle answers have been enhanced

Question:

Answer:

ONE

Length:

Similar Crossword Questions:

Number of times the letter 'U' appears in each of this puzzle's eight longest answers
Venomous snakes lurking in each of the four longest puzzle answers
European acme, and word hiding in this puzzle's 5 longest answers
Word "split" in this puzzle's eight longest answers
Action hero's garb, and what each first word in this puzzle's four longest answers is
Word divided in this puzzle's nine longest answers
Narcissists' interests (one of which can be found in each of the puzzle's longest answers)
It precedes the last words of the four longest puzzle answers
Easter bunny's spring, found in this puzzle's nine longest answers
Clue for this puzzle's four longest answers
Spell "bound" by this puzzle's four longest answers
What this puzzle's seven longest answers have in common
Bar found at the end of this puzzle's seven longest answers
Place where the starts of this puzzle's four longest answers result in a penalty
Child in seven of this puzzle's longest answers
They're hidden in this puzzle's nine longest answers
Support worker hiding in the eight longest puzzle answers
Geeky sort found within this puzzle's four longest answers
Annual cause of losing an hr.'s sleep hidden in this puzzle's 10 longest answers
The eight longest answers in this puzzle each have 13 unique ones
String of letters found in this puzzle's longest Across answers
Words that can precede both parts of this puzzle's six longest answers
Instantly ... or how this puzzle's other three longest answers came about?
Summer blazer, which can come before the starts of this puzzle's four longest answers
Ocean "crossing" this puzzle's four longest answers (abbr.)