Ascientist is observing onion cells and human cheek cells under a microscope. which observation does she most likely make? the onion cells have lysosomes, and the cheek cells do not. the cheek cells have larger vacuoles than the onion cells. the cheek cells have a nucleus, and the onion cells do not. the onion cells have a cell wall, and the cheek cells do not.

the onion cell has a cell wall, and the cheek cells do not.

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.