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Radon is a chemical element; it has symbol Rn and atomic number 86. It is a radioactive noble gas and is colorless and odorless. Of the three naturally occurring radon isotopes, only 222 Rn has a sufficiently long half-life (3.825 days) for it to be released from the soil and rock where it is generated.
Crosswordese is the group of words frequently found in US crossword puzzles but seldom found in everyday conversation. The words are usually short, three to five letters, with letter combinations which crossword constructors find useful in the creation of crossword puzzles, such as words that start and/or end with vowels, abbreviations consisting entirely of consonants, unusual combinations of ...
An American-style crossword grid layout. A crossword(or crossword puzzle) is a word gameconsisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter ...
Sally Hoelscher, USA TODAY. October 1, 2024 at 10:00 PM. There are spoilers ahead. You might want to solve today's puzzle before reading further! College Food. Constructor: Aidan Deshong. Editor ...
[6] Any time a clue ends in a question mark, the answer is a play on words (e.g., [Fitness center?] for CORE). [6] Occasionally, themed puzzles will require certain squares to be filled in with a symbol, multiple letters, or a word, rather than one letter (so-called "rebus" puzzles). This symbol/letters/word will be repeated in each themed entry.
Roman numerals: for example the word "six" in the clue might be used to indicate the letters VI; The name of a chemical element may be used to signify its symbol; e.g., W for tungsten; The days of the week; e.g., TH for Thursday; Country codes; e.g., "Switzerland" can indicate the letters CH; ICAO spelling alphabet: where Mike signifies M and ...
The clues are "self-checking." This is in contrast to non-cryptic crossword clues which often have several possible answers and force the solver to use the crossing letters to distinguish which was intended. Here is an example (taken from The Guardian crossword of 6 August 2002, set by "Shed"). 15D Very sad unfinished story about rising smoke (8)
Argon is the most abundant noble gas in Earth's crust, comprising 0.00015% of the crust. Nearly all argon in Earth's atmosphere is radiogenicargon-40, derived from the decayof potassium-40in Earth's crust. In the universe, argon-36is by far the most common argon isotope, as it is the most easily produced by stellar nucleosynthesisin supernovas.