0
The half-life of Au-198 is 2.7 days When there are 800 atoms of Au-198 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 8.1 days how many atoms of Au-198 remaining?
Wiki User
∙ 11y ago
8.1 days is, if half-life is 2.7 days, 3 half-lives. 12.5%, or 12.5 g, of 79198Au would remain after three half-lives.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What is the time needed for half of a sample of a radioactive isotope to break down to form daughter isotopes called?
halflife
How do you identify beta decay?
A sample of 187 rhenium decays to 187-omium with halflife of 41.6 billion years. If all 188 osmium are normalized isotopes.
How does the length of the half-life of the element correspond to the radioactivity of the element?
The length of time required for half of a sample of radioactive material to decay
When is chromatography found in everyday life?
It is used every day by analytical scientist to find out the amount of substance in a sample.
A uranium235 sample starts with 200 atoms and 700 million years later there are 100 atoms What is the halflife of uranium235?
700 milliion years. The definition of half-life is the period of time during which one-half of the atoms of an element undergo decay into other elements.
The halflife of Na24 is 15 hours When there are 1000 atoms of Na24 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 45 hours there are atoms of Na24 rema?
125
The half-life of Na-24 is 15 hours When there are 1000 atoms of Na-24 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 45 hours there are atoms of Na-24 remaining?
its 125
The half life of Au198 is 2 7 days When there are 800 atoms of Au198 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 8 1 days there are atoms of Au198 rema?
100
The half-life of Au-198 is 2.7 days When there are 800 atoms of Au-198 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 8.1 days there are atoms of Au-198 re?
its 100
What is the time needed for half of a sample of a radioactive isotope to break down to form daughter isotopes called?
halflife
How do you identify beta decay?
A sample of 187 rhenium decays to 187-omium with halflife of 41.6 billion years. If all 188 osmium are normalized isotopes.
What can the scientist conclude from a scientist finds formania on a bone sample?
The Bone was located near the brain
What can the scientist conclude from a scientist finds fossae on a bone sample?
This bone had nerve running through it.
A scientist find fossae on a bone sample. what can the scientist conclude?
This bone was near blood vessels or organs.
What is the mass of K 42 remaining in a 16g sample of 37.2hrs?
2.09
A scientist suspect that a mineral sample is a carbonate. which useful for identifying the sample as a carbonate?
A sample of carbonate is acid. Acid is what identifies carbonate in science studies.
How does the length of the half-life of the element correspond to the radioactivity of the element?
The length of time required for half of a sample of radioactive material to decay
