Remember the ETC from photosynthesis.
Those charged electrons had a number of
jobs. Remember how they were involved
in the transfer of energy. For example:
Electrons absorbed photons and were
instrumental in changing the charge of
the Inner Thylakoid Space and Stroma.
This created a tiny magnet that help to
build ATP.
Electrons absorbed ATP and were
instrumental in changing the charge of
the Inner Thylakoid Space and Stroma.
This allowed hydrogen lons to move from
the Stroma to inside the Thlakoid
membrane.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.