Answer:
d properties
i took a test on this before
Astatine. Because it has the smaller shell of electrons. I believe
Independent and dependent variables and constants
You have to think about the fact that hot air is constantly being blown up elevating the balloon once that air is taken away it's up to the steering and the wind after that. I know that probably doesn't help did you want to know the science part?
Answer:
Solubility, Volatility, Viscosity and Surface Tension.
