Answer:
B They move because of the convection currents in the mantle.
The answer will be (4) HI because the greater the difference of the bonds in electronegativity, the more polar a bond is.
Explanation:
use the term electron sheilding, the more electrons between the valence el3ctron and nucleus the easier to lose the valence electron (more sheilding = easier to lose)
By Boyles Law (P1V1=P2V2), substituting values in and solving for V2, we find that the new volume is 3.6 L<span />
