Which of the following is an example of data that would be collected by an environmental geographer? change in air quality of a large city
change in size of freshwater lake
change in cloud cover during hurricanes
change in precipitation during El Nino
HEL

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.

gas and precipitate r the correct answers