Question

You have 700,000 atoms of a radioactive substance. After 2 half-lives have past, how

Answer 1

Answer:

175,000

Explanation:

700,000/4=175,000

2 half-lives = approx 175,000

Answer 2

The number of atoms that remains after 2 half-lives given that it was originally 700,000 atoms is 175000 atoms.

What is a radioactive substance?

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:

brainly.com/question/27755919

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