Instructions Competition Mode: For each correct answer, you get points based on how many other players get the question wrong. Your score is the sum of all correct answers.

Example: If you get a question correct that only 10% of all players get correct, you get 90 points for that question.

You can choose 5 questions to "Double". If you get it correct, your score is doubled for that question.

TIP: Easy questions aren't usually worth doubling since you are likely doubling a small number of points. You're better off doubling the hardest questions that you think you have correct (80 points possibly doubled is a lot better than 10 points definitely doubled).

You will not lose points for incorrect answers, so feel free to guess.

You can enter up to three group names, separated by commas, in the "Private Group" input. After you submit, when you view your results you can see the leaderboards for just your group(s). You will also get links you can share with others so they can play in those groups.
Feel free to create your own group name, such as your company or town, and pass the links along to friends, family, and coworkers.

Good luck!
    
 
Question #18: Science: With a half-life of 23 yoctoseconds, or 23 x 10-24 seconds, an isotope of what element, with a nucleus containing 6 neutrons more than its most common isotope and first synthesized in 2003, is considered the isotope with the shortest half-life?

Answer: hydrogen
Three naturally occurring, non-radioactive isotopes of hydrogen exist: protium, deuterium, and tritium. All heavier isotopes are synthetic and have half-lives less than a zeptosecond (10-21 seconds). Of these, Hyrogen-5 is the most stable, while the least stable is Hydrogren-7.
All Submissions
?
Americium
Californium
Carbon
Carbon
Carbon
Carbon
Carbon 12
Cesium
Curium
Einsteinium
francium
Germanium
Hydrogen
Hydrogen
Hydrogen
hydrogen
IDK
kryptonium
oxygen
Plutonium
plutonium
Radium
Radium
Seaborgium
Tennessene
Uranium
Uranium
Uranium
Uranium
uranium
uranium
uranium
Uranium 237
Uranium-238
Score - 8.33%

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