isotope
They have the same atomic number but different mass numbers. This topic is part of Chemistry within Science & Nature. This page currently draws on 17 supporting questions, with answers and bonus facts available below.
isotope trivia questions
Isotopes are atoms of the same element with different numbers of what?
Answer: Neutrons
Bonus fact: They have the same atomic number but different mass numbers.
Carbon-12 and carbon-14 are examples of what?
Answer: Isotopes
Bonus fact: Both have six protons but different neutron counts.
Which isotope of carbon is widely used in archaeological dating?
Answer: Carbon-14
Bonus fact: Radiocarbon dating measures the decay of carbon-14.
Which carbon isotope is widely used to date once-living archaeological materials?
Answer: Carbon-14
Bonus fact: Carbon-14 decays at a predictable rate and is used in radiocarbon dating.
The most common isotope of hydrogen has how many neutrons?
Bonus fact: Protium, ordinary hydrogen-1, has one proton and no neutrons.
Which uranium isotope is most important for sustaining many reactor chain reactions?
Answer: Uranium-235
Bonus fact: U-235 is fissile with slow neutrons.
Brown dwarfs can fuse which isotope at sufficiently high mass?
Answer: Deuterium
Bonus fact: Deuterium fusion can occur even when ordinary hydrogen fusion cannot.
Which isotope is widely used in nuclear fission reactors?
Answer: Uranium-235
Bonus fact: U-235 readily undergoes neutron-induced fission.
A radioactive isotope has an unstable what?
Answer: Nucleus
Bonus fact: Unstable nuclei decay spontaneously.
Uranium enrichment increases the proportion of which isotope?
Answer: Uranium-235
Bonus fact: Natural uranium contains only a small percentage of U-235.
What isotope is measured in radiocarbon dating?
Answer: Carbon-14
Bonus fact: Carbon-14 decays at a predictable rate.
The SI second is defined using the transition frequency of which isotope?
Answer: Cesium-133
Bonus fact: The defining cesium-133 frequency is exactly 9,192,631,770 hertz.