138Ba has this many neutrons
What is 82?
151Eu gives off an alpha particle to become this isotope
What is 147Pm?
128 grams of a radioisotope leaves the factory and when it arrives, only 32 grams are remaining because this many half lives have gone by.
What is 2 half lives?
This is the heaviest element that can be made by fusion and releases energy
What is 56Fe?
This is the country with the longest land border with France
What is Brazil?
An atom with 31 protons and 38 neutrons has this isotope symbol
What is 69Ga?
This isotope undergoes beta decay to leave behind 67Zn
You pick up an 86 g sample of 218Po and take 6.10 minutes to walk to the other end of the school, where you find you only have 21.5 grams left because this is the half life of 218Po
What is 3.05 minutes?
This is the lightest element that can be produced by fission and releases energy
What is 56Fe?
This is the largest rocky planet in our solar system
What is Earth?
An atom of 20Ne has this many up quarks
What is 30?
A sample of rhenium undergoes this type of decay and transmutes into tungsten atoms
What is positron emission?
OR
What is electron capture?
The half-life of this isotope is this long.
What is 25 seconds?
During a nuclear explosion, 239Pu splits into 93Zr and 136Xe, and this many of these particles
What is 10 neutrons?
The busiest airport in the world is located in this US city
What is Atlanta?
An atom of 180Hf has this many electrons
What is 72?
131Ba emits a particle and becomes 131Cs, which means 131Ba had too many of these particles
What is neutrons?
At the birth of the universe, 14 billion years ago, you order 500 grams of 238U (hf = 4.4 billion years), and the shipment has finally arrived, but with only this much 238U left
What is 55 grams?
During a nuclear reaction, 233U splits into 72Ge and this isotope.
What is 161Nd?
On March 25, 2026, this company was found liable for selling addictive products to children and awarded a $6 million verdict to the plaintiff, Kacey.
What is Meta?
OR
What is Google?
Silver consists of two stable isotopes: 107Ag and 109Ag, and this is the more abundant isotopes
What is 107Ag?
226Ra undergoes 3 rounds of alpha decay, 2 rounds of beta decay, 1 more alpha decay, 2 more beta decays, and 1 more alpha decay to become this stable isotope
What is 206Pb?
A lily pad doubles in size every day, and on the 30th day, the lily pad covers the entire pond, so on this day, the lily pad covered half of the pond.
What is the 29th day?
During a nuclear reaction, 235U splits into 127I and another isotope that is most likely to undergo this type of decay next.
What is positron emission or electron capture?
108Y has way too many neutrons (~20 neutrons too many)
On March 21, 2026, this musical group returned after a 4-year hiatus caused by all seven members performing mandatory military service.
What is BTS?