When an atom undergoes reduction, which item has a tendency to decrease
1.number of electrons
2.number of protons
3.the oxidation number
4.all of above
5.none

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but