Answer:
In a second hydrogen atom, an electron drops from level 2 to 1 .
Answer:
if u have to round it to the nearest ones plat 3.2 or 3.1 and if u have to round to the tenths place 3.16
Answer:
Physical.
Explanation:
Nothing changes in a chemical state just adding hot air to a balloon.
Answer:
i would say A-B
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The answer is most likely D