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
Three-letter combinations hidden in this puzzle's six other longest answers
Deg. of the professional who may instruct you to do the last words of the four longest puzzle answers
Driveway stuff (and word that's hidden in this puzzle's four longest answers)
Corp. transfer found in this puzzle's four longest answers
What each of the other four longest answers in this puzzle is
Some graffiti signatures (which were used to form this puzzle's four longest answers)
Final (and a word that can precede the first word of this puzzle's longest answers)
They're hidden in this puzzle's six longest answers
The starts of this puzzle's six longest answers are types of them
Asked, burst open, extracted, or broke, as the ends of this puzzle's four longest answers
Hoop group hidden inside this puzzle's three longest answers
One is hidden in each of this puzzle's four longest answers
Role model hidden in this puzzle's longest answers
Word hidden in this puzzle's longest answers
Triatomic gas in a thinning layer ... and, symbolically, what appears in this puzzle's four longest answers
Piece that can follow the ends of the nine longest puzzle answers
Word that goes after the start of and before the end of the five longest answers in this puzzle
Featured article hidden in this puzzle's nine longest answers
They are found in this puzzle's three longest answers
Synonym for the first words of this puzzle's four longest answers
The word, as suggested by the saying formed by the ends of this puzzle's four longest answers
Queen whose name contains three apt words in a row, as does each of this puzzle's four longest answers
Neutral color running through the four longest puzzle answers
Bird hiding in the four longest puzzle answers