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Krypton Trivia Quiz

The element krypton.

A multiple-choice quiz by TonyTheDad. Estimated time: 3 mins.

Author
TonyTheDad

Time
3 mins

Type
Multiple Choice

Quiz #
73,375

Updated
Dec 03 21

# Qns
5

Difficulty
Average

Avg Score
3 / 5

Plays
1413

One at a Time - Single Page - Timed Game

Question 1 of 5

1. The atomic symbol for krypton is: Hint

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Question 2 of 5

2. The name krypton is Greek for: Hint

hidden

death

green

heavy

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Question 3 of 5

3. Krypton's major spectral lines are these two colors: Hint

orange and green

blue and yellow

red and green

violet and green

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Question 4 of 5

4. Krypton has 6 stable isotopes. The longest lived of its unstable isotopes has a half-life of: Hint

5280 years

3 seconds

15 hours

210,000 years

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Question 5 of 5

5. Krypton is grouped in this classification group: Hint

halogen

non-metal

rare earth

noble gas

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Quiz Answer Key and Fun Facts

1. The atomic symbol for krypton is:

Answer: Kr

'K' is potassium (Latin: {kalium);} 'Sm' is Samarium (not Superman). 'Kt' is not a valid symbol.

2. The name krypton is Greek for:

Answer: hidden

Greek 'kryptos'. Krypton exists in the Earth's atmosphere at only one part per million. In comparison, oxygen exists at 200,000 ppm, so krypton is indeed hidden.

3. Krypton's major spectral lines are these two colors:

Answer: orange and green

The orange-red spectral line of Kr-86 was the basis for the 'meter' measurement of the Metric System.

4. Krypton has 6 stable isotopes. The longest lived of its unstable isotopes has a half-life of:

Answer: 210,000 years

Kr-81 has a half-life of 210,000 years. It is sandwiched between two stable isotopes: Kr-80 and Kr-82.

5. Krypton is grouped in this classification group:

Answer: noble gas

As such, it does not readily form compounds with other elements. However, compounds with fluoride and molecule-ions with other noble gases have been identified.

Source: Author TonyTheDad

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