Me i will give
fluorine-19 is an isotope of fluorine. it has a different number of
a. electrons
b. protons
c. neutrons
d. electron shells

Flourine-19 has 19 electrons, 9 protons, and 10 neutrons.

Flourine has 9 electrons, 9 protons, and 10 neutrons.

So the answer would be A. electrons.

Hope this helps!

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.