The best explanation would be A. The reason the balloon is inflated is because its filled with gas, and the gas particles collide with the interior of the balloon to give it its shape.
Energy levels are considered orbitals.
1. c
2. a
3. a
(I’m not 100% but 2 & 3 couldn’t be transform)

The (( mole calcium ))s are simplified so the answer is based on the number of calcium atoms.



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Answer:
Experiment 1
Explanation:
I don’t know if this is right