An element whose atoms have the electron configurations 2-8-18-1?

An easy way to figure it out is adding the number of electrons to find the atomic number, it is copper (atomic number 29)

If you open the bottle of perfume then nothing but the smell will come out of it and yes it is a type of gas smell because it’s say it in english so i can understand better and you

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts