Answer: it becomes a positive ion
Explanation:
So, when an atom loses 2 electrons there will be no change in the number of neutrons. Therefore, an isotope will not form. Thus, it is concluded that when an atom with no charge loses two electrons, it becomes a positive ion.
Via half-life equation we have:
Where the initial amount is 50 grams, half-life is 4 minutes, and time elapsed is 12 minutes. By plugging those values in we get:
There is 6.25 grams left of Ra-229 after 12 minutes.
Its A: the use of hydropower often changes the natural flow of water through an ecosystem
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Answer: The air pressure would build up resulting in a high air density.
Explanation: Heat energy builds up air pressure. And if you surround it with bubble wrap, that air pressure will have nowhere to release to. And so because of that, high air density occurs.
D. a system for conducting a scientific investigation
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