The number of atoms that remains after 2 half-lives given that it was originally 700,000 atoms is 175000 atoms.
<h3>What is a radioactive substance?</h3>
Radiation in the form of radiant particles or rays, is the result of a nuclear disintegration. Radioactive materials are atoms that have stored energy and may disintegrate in the future, releasing radiation.
Data obtained from the question
Original amount (N₀) = 700,000 atoms
Number of half-lives (n) = 2
Amount remaining (N) =?
How to determine the amount remaining
The amount remaining after 2 half-lives can be obtained as illustrated below:
N = N₀ / 2ⁿ
N = 700,000 / 4
N = 175000 atoms
Hence, 175000 atoms remain.
Learn more about the radioactive substance here:
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Answer:
=> 11. <u>d.</u> Moon
The moon is not a light source because it does not emit its own light.
=> 12. b. <u>The</u> <u>light</u> is <u>refracted</u>.
13. What is the substance produced by a chemical reaction called?
=> b. Product
+2 is you're answer for question number 5
Answer:
I think that it's b
Explanation:
please please tell me if it's the right answer
