Explanation:
the physical and chemical properties of an element are periodic functions of their atomic number.
The helium would expand into the air of the room. Depending on how big the room is, and the amount of helium in the jar, it could cause damage to health. The only way this would happen is if the room was small and the jar was big.
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Answer:
What was the assignment? There's nothing attached, my guy
Explanation:
