What is it?
Isotopes of a given element will have a different number of this particle
What is neutrons?
If the half-life of a 2.0 gram sample of a radionuclide is 15 hours, then the half-life of a 1.0 gram sample of the same radionuclide would be
What is 15 hours?
If we start with 400 g of uranium, how many would remain after 2 half-lives?
What is 100 g
what is radioactivity?
What is the emission of radiation or particles caused disintegration of an atomic nucleus.
How is an isotope different from the standard form of a chemical element?
What is it has a different number of neutrons
How many protons does Plutonium-260 have?
What is 94 protons?
An isotope has a half live of 45 years. If 315 years have passed, how many half-lives have passed?
What is 7 half-lives?
if we start with 800 g of radon how much would remain after 2 half-lives?
What is 200 g
if we start with 20 grams of uranium, how much LEAD would remain after 2 half-lives
What is 15 grams
The % of the parent isotope remaining after 1 half-life is:
What is 50%
The proportion left of the parent nuclei after two half-lives.
What is 25%
How many grams of sample decayed if you start with 75 grams of sample and end with 7 grams of sample?
What is 68 grams of sample?
if you have 24 grams of uranium how much lead would remain after 3 half-lives (hint:uranium turns into lead)
What is 21 grams
if we start with 24 grams of uranium how much LEAD would remain after 2 half-lives?
What is 18 grams
What is the dating method used by scientists to determine the exact age of a rock?
What is absolute dating or radio carbon dating
What part of the atom decays?
What is nucleus/nuclei?
Os-182 has a half-life of 21.5 hours. How many grams of a 10.0 gram sample would remain after exactly three half-lives?
What is 1.25 g?
if we start with 40g of uranium, how many would remain after 3 half-lives?
What is 5g
if we start with 12 grams of uranium, how much would remain after 3 half-life
What is 1.5 grams
What kind of dating tells scientist an age range of a rock?
What is relative dating
what is half-life?
What is the time it takes for a radioactive substance to lose half its radioactivity.
The half-life of Zn-71 is 2.4 minutes. If you had 100.0 g at the beginning, how many grams would be left after 7.2 minutes?
What is 12.5 g?
if we start with 48g of carbon-14, how many would remain after 3 half-lives?
What is 6g
device used to determine the radioactivity of an item
What is a Geiger counter
A form of a chemical element in which the atoms have the same number of protons (part of the nucleus of an atom) but with a different number of neutrons (part of the nucleus of an atom)
what is an Isotope