If they were not repeatable people would think the experiment is not accurate. If it can be repeated than the data can prove a very valid point.
Okay so we are given these requirements:
element which can be used to stuff
bottles that enclose ancient paper
must be a gas at room temperature
must be denser than helium
must not react with other elements
The only element that comes into my
mind is:
<span>Argon</span>
Its structure is Au with one dot on top
Nitrogen is 78.08% of the air is fills the earth's atmosphere.
