Atomic number = number of proton = 16
Atomic mass = number of proton + number of neutron = 16+18 = 34
Net charge = Number of proton - number of electron = 16-13 = +3
OPTION A IS YOUR ANSWER....
C. The law of segregation. Hope this helps.
I agree: a capped soda bottle has very limited contact with the surroundings, as it has to be relatively closed so that the gas bubbles don't escape.
The remaining options have contact either with air (A and D) or with water from the outside (B)
Water is considered polar because of the overall charge is unevenly distributed
