Scientists use the emission spectra of elements to detect

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is

Thermohaline circulation and gyres

☆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