Given the atomic notation of 19/9 X, identify element X.
a fluorine
b neon
C potassium
d nickel

Explanation:

The notation refers to some element X that has 9 protons and 19 protons and neutrons (so that means 19-9 = 10 neutrons). The element that has 9 protons is fluorine (symbol F on the periodic table)

This means would update to

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.