Using the formula above, what is the wavelength of light emitted between the 2^{nd}2 nd and 1^{st}1 st energy levels? using the Rydberg equation

☆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

Is there a picture or answer choices?

The correct answer is:   bri hope this answer was ! : )