b) false
After two half-lives, there is no longer any of the original radioactive material remaining. Thus, the given statement is true.
A radioactive isotope's half-life is the amount of time it takes for the number of nuclei in a sample to decrease by half. The Phanerozoic eon refers to the whole period of geologic time that preceded the start of the Paleozoic era. The isotope's mass number is unaffected by the emission of a beta particle. There is no longer any of the original radioactive material after two half-lives.
A half-life, or the amount of time it takes for half of a substance to decay radioactively, is what distinguishes natural radioactive processes. It is simple to determine how much material remains after a specific number of half-lives. For instance, the six-hour half-life of the aforementioned technetium-99m indicates that starting at 100 percent, after six hours, we can no longer detect it.
Learn more about radioactive isotopes, here:
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Answer:
true
After two half-lives, there is no longer any of the original radioactive material remaining.
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b. sugarcane
c. coffee
d. tomatoes
Answer:
The correct answer is D
Explanation:
What are my long-term goals for my life?
What are my dreams in regards to what I want to make of my life?
Answer: 2/3
Explanation:
About 4 billion people, representing nearly two-thirds of the global population, experience severe water scarcity during at least one month of the year.
a. True
b. False
Answer:
B. False
Explanation:
Desert is an area where rainfall is very little. Deserts are terrestrial ecosystems that are dominated by certain flora and fauna and are characterized by a dry climate with very little rainfall of 250 mm in a year.
Based on its astronomical location, this desert is found at 20º to 30º North Latitude and South Latitude which starts from the Atlantic Coast region in Africa to the central Asian region. Throughout this area there are the widest deserts in the world, namely the Sahara Desert, the Gobi Desert, and the Arabian Desert.
The equator is at a latitude of 0º to 23.5º so that the location of the desert is not located in the tropics alone but in subtropical climates and temperate climates.
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Similarities between sills and lapoliths brainly.com/question/12697997#
Keywords
- Deserts
- Equator