Gaseous butane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . If 82.1g of carbon dioxide is produced from the reaction of 49.40g of butane and 107.8g of oxygen gas, calculate the percent yield of carbon dioxide.

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.