, or DDT, is a synthetic chemical that was first made in 1874. Some years later, it was discovered that it was highly effective in killing insects. By 1945, it was widely used in agriculture. DDT was used for years and was used globally before it was discovered that it harms wildlife. Your job is to do some digging and find out exactly what problems DDT caused, what species were affected and how, and what the EPA did about the problem. You will then write an article about DDT.

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.