Help with this question

so you know that   Oxygen. A, number of protons and neutrons=16 and Z, number of protons=8

so...you find the amount of neutrons a-z=n

16-8=n

16-8=8

then for oxygen A number of protons and neutrons,=18,Z,number of neutrons=8

so18-8=N

18-8=10

so the difference is in the number of there neutrons, and the main reason of them being a isotope.

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